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Montgomery College *

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203

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Mechanical Engineering

Date

Dec 6, 2023

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docx

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6

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Related Questions

6.5
DESIGN CHANGE. Now:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
a)
Assume sufficient friction to prevent slippage of the Object.
The magnitude of the maximum P that will not initiate tipping of the Object is _____lb.
b)
Assume tipping of the cabinet does not occur.
The magnitude of the maximum P that will not initiate slipping of the Object is _____lb.
c)The magnitude of the maximum P that will not initiate motion of the Object is _____lb.

*arrow_forward*

Need help question 3. please
1-DESIGN CHANGE. Now:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
Assume sufficient friction to prevent slippage of the Object.
The magnitude of the maximum P that will not initiate tipping of the Object is _____lb.
Answer:
48.044
2
DESIGN CHANGE. LET:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
Assume tipping of the cabinet does not occur.
The magnitude of the maximum P that will not initiate slipping of the Object is _____lb.
Answer:
52.419
3-
DESIGN CHANGE. Now:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
The magnitude of the maximum P that will not initiate motion of the Object is _____lb.

*arrow_forward*

A block rest on a horizontal board. the board is gradually tilted upward and theblock just begin to slide when the angle of inclination is 21°.
a. Find the coefficient of static friction between the block and the board.

*arrow_forward*

DESIGN CHANGE. Now:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
The magnitude of the maximum P that will not initiate motion of the Object is _____lb.

*arrow_forward*

Problem 4. A.) If the uniform concrete block has a mass of 500 kg, determine the smallest horizontal force P needed to movethe wedge to the left. The coefficient of static friction between the wedge and the concrete and the wedge and the floor is 0.3. The coefficient of static friction between the concrete and floor is 0.5.ANSWER: P=1797.52; N=1.80kNB.)Refer to problem number 4. Calculate the followinga.) the angle of friction between the wedge and the concrete and the wedge and the floor.Answer: ?????? ??? ????????= ?????? ??? ?????= 16.7ob.) the coefficient of static friction between the concrete and floor.Answer: ????????? ??? ?????= 263.56o

*arrow_forward*

A slider crank mechanism operates at 5 m/s and applies a force of 40 N to the slider. The slider weighs about 3 kg and the coefficient of friction is the same at the top and bottom. The slider has a dimension of 0.6 m x 0.2 m. Design a lubrication system that will separate the slider with its cylinder.

*arrow_forward*

The angle of repose for a block on an inclined plane is 40 degrees and the coefficient of kinetic friction is 0.3. (a) What is the coefficient of static friction? (b) If the plane is inclined at 42 degrees with the horizontal, find the acceleration of the block

*arrow_forward*

1. A 5.0kg steel block is resting on a horizontal table. The coefficient of static friction is 0.75 and coeficient of kinetic friction is 0.57. What is the maximum force that can be applied horizontally before it starts to move?
2. Three drums stacked as shown. Considering the weight of the drums and friction in all contact surfaces, how many forces are there in the FBD of A? (Friction and normal forces are treated separately.) (*see first image for the figure)
3. How many components (forces and couples) does a fixed support in 3D contain? (*see second image for the figure)

*arrow_forward*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.Submit your question to our 24/7 subject matter experts with Masters and PhDs and get a solution in as fast as 30 minutes*
Provide a complete and elaborate solution. Show step by step solution
Consider the figure below. If block A and B have masses of 30 and 40 kg respectively and static friction coefficients of 0.15 and 0.25 respectively as well, what minimum weight of block C is required for there to be a movement up the incline? Kinetic friction coefficient is both 0.10. Next, if block C has a mass of 20 kg, what will be the acceleration and direction of movement of the blocks?

*arrow_forward*

Explain the laws of Static Friction.

*arrow_forward*

A pile-driver hammer has a mass of 300 kg and is to be raised 16 m in 4 sec. The total friction on the guides is constant at 400 N. What constant pull must be exerted on the cable?

*arrow_forward*

A uniform ladder 18 ft long and weighing 120 lbs rests against a smooth wall. The angle between the ladder and the ground is 70°. The coefficient of friction between the ground and the ladder is 0.25. How far up the ladder can a 180 lb man walk before the ladder slips?

*arrow_forward*

Plz attempt if you know the answer otherwise skip to another expert.
A flat belt is required to transmit 30 kW from a pulley of 1.5 m effective diameter running at 300 rpm. The angle of contact is spread over 11/24 of the circumference. The coefficient of friction between the belt and pulley surface is 0.3. Determine taking centrifugal tension in to account, width of the belt required. It is given that the belt thickness is 9.5 mm, density of belt material is 100 kg / (m ^ 3) and the permissible working stress is 2.5 MPa.

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Determine diameter of hand-wheel or length of handle, assuming that maximum force exerted by a man is 150 lbf.
The bolt is 1" OD, 0.9" ID. Coefficient of friction is .15
You need to push down with a force of 6000lbf. This is for a handle of a screw press.
Please explain the equation and I will upvote

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A box slides from rest from point A down a plane inclined 30 degrees to the horizontal. After reaching the bottom of the plane, the box moves on the horizontal floor at a distance of 2 m before coming to rest. If the coefficient of friction between the box and plane and between the box and floor is 0.40, what is the distance of point A from the intersection of the plane and the floor?

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Example Problem #4 A disk brake has two pads which cover 45 degrees of the disk. The outside radius is 6.0 inch and the inside radius is 4.0 inch. Assume a coefficient of friction of 0.4, and a max pressure, pa-100 psi a) Find the force required to apply one pad. b) Find the torque capacity for both pads.

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Explain five basics laws of static friction

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Refer to Fig 33. The homogenous body A weighs 120 lb. The coefficients of frictions are 0.30 between A and the plane and 2/pi between the rope and the drum. What value of W will cause motion of A to impend? Give solution. (Ans. W= 81.5 lb)

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What is the value of P in the system shown in Fig to cause the motion to impend? Assume the pulley is smooth and coefficient of friction between the other contact surfaces is 0.2. Figure:5

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The coefficient of friction for both surfaces is 0.20. The force P that will cause impending motion is nearest:

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8. Answer the following questions about the exercise of Box A (massmA=50kg) and Box B (mB=10kg) located on the slope as shown in Figure 7. Between slope and box A, the coefficient of static friction is uk, and the angle of slope is 10 degrees, although box A and B are connected in a solid line and ignore the mass of the pulley.1)What is the maximum friction (kgf) between Box A and Slope for us=0.4 and Uk=0.15?2)What is the maximum friction between Box A and the slope (kgf) for us=0.3 and UK=0.15?3)us=0.3 and Uk=0.15 What is the tension in kgf?4)us=0.3 and uk=0.15 when box B goes down 2m, calculate the size (m/s) of the speed of box A and box B using the modified energy supply law.

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A pulley with a diameter of 4 in. can rotate about a fixed shaft with a diameter of 2 in. The coefficient of static friction between the pulley and shaft is 0.20. Determine;
a. the smallest vertical force P required to start raising a 500-lb load.
b. thesmallest vertical force P required to hold the load.
c. the smallest horizontal force P required to start raising the same load.

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What does sliding' or slipping condition means velocities are the same in the normal direction Ofriction is maximum Friction is unknow Ovelocities match

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Question-6 What is the value of P in the system shown in Fig to cause the motion to impend?Assume the pulley is smooth and coefficient of friction between the other contact surfaces is 0.2.Figure:5

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A bicycle and rider, travelling at 12 km/hr on a level road, have a mass of 105 kg. A brake is applied to the rear wheel, which is 800 mm in diameter. The pressure force on the brake is 80 N and the coefficient of friction is 0.06. Find the distance covered by the bicycle and the number of turns of its wheel before coming to rest.

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A)What force F is needed to get the 300kg block shown in the figure below to move to the right?
(b) What is the frictional force developed between the two blocks in N?
(c) What is the frictional force developed between the 300kg block and the ground surface in N?
The coefficient of static friction for all surfaces is 0.3. The angle, theta=100
The force F =
N
The frictional force between the two blocks =
The frictional force between the 300kg block and the ground=

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A 75 N force, inclined at an angle a = 45° as shown in Figure 3.5, pulls a 100 N block. The coefficient of static friction between the block and the floor is 1.3, and the coefficient of kinetic friction is 1.1. Determine the friction force between the block and the floor.

*arrow_forward*

In a test, speed drops from 120 Km/hr to full stop, takes 65.2 sec .Determine the rolling resistance coefficient. The vehicle has Cd= 0.4 and frontal area of 2 m2.

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SEE MORE QUESTIONS

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Related Questions

6.5
DESIGN CHANGE. Now:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
a)
Assume sufficient friction to prevent slippage of the Object.
The magnitude of the maximum P that will not initiate tipping of the Object is _____lb.
b)
Assume tipping of the cabinet does not occur.
The magnitude of the maximum P that will not initiate slipping of the Object is _____lb.
c)The magnitude of the maximum P that will not initiate motion of the Object is _____lb.

*arrow_forward*

Need help question 3. please
1-DESIGN CHANGE. Now:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
Assume sufficient friction to prevent slippage of the Object.
The magnitude of the maximum P that will not initiate tipping of the Object is _____lb.
Answer:
48.044
2
DESIGN CHANGE. LET:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
Assume tipping of the cabinet does not occur.
The magnitude of the maximum P that will not initiate slipping of the Object is _____lb.
Answer:
52.419
3-
DESIGN CHANGE. Now:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
The magnitude of the maximum P that will not initiate motion of the Object is _____lb.

*arrow_forward*

A block rest on a horizontal board. the board is gradually tilted upward and theblock just begin to slide when the angle of inclination is 21°.
a. Find the coefficient of static friction between the block and the board.

*arrow_forward*

DESIGN CHANGE. Now:
The Object weighs 100 lb
The angle of P above the horizontal is 42 degrees
The coefficient of static friction is 0.6
The magnitude of the maximum P that will not initiate motion of the Object is _____lb.

*arrow_forward*

Problem 4. A.) If the uniform concrete block has a mass of 500 kg, determine the smallest horizontal force P needed to movethe wedge to the left. The coefficient of static friction between the wedge and the concrete and the wedge and the floor is 0.3. The coefficient of static friction between the concrete and floor is 0.5.ANSWER: P=1797.52; N=1.80kNB.)Refer to problem number 4. Calculate the followinga.) the angle of friction between the wedge and the concrete and the wedge and the floor.Answer: ?????? ??? ????????= ?????? ??? ?????= 16.7ob.) the coefficient of static friction between the concrete and floor.Answer: ????????? ??? ?????= 263.56o

*arrow_forward*

A slider crank mechanism operates at 5 m/s and applies a force of 40 N to the slider. The slider weighs about 3 kg and the coefficient of friction is the same at the top and bottom. The slider has a dimension of 0.6 m x 0.2 m. Design a lubrication system that will separate the slider with its cylinder.

*arrow_forward*

The angle of repose for a block on an inclined plane is 40 degrees and the coefficient of kinetic friction is 0.3. (a) What is the coefficient of static friction? (b) If the plane is inclined at 42 degrees with the horizontal, find the acceleration of the block

*arrow_forward*

1. A 5.0kg steel block is resting on a horizontal table. The coefficient of static friction is 0.75 and coeficient of kinetic friction is 0.57. What is the maximum force that can be applied horizontally before it starts to move?
2. Three drums stacked as shown. Considering the weight of the drums and friction in all contact surfaces, how many forces are there in the FBD of A? (Friction and normal forces are treated separately.) (*see first image for the figure)
3. How many components (forces and couples) does a fixed support in 3D contain? (*see second image for the figure)

*arrow_forward*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.Submit your question to our 24/7 subject matter experts with Masters and PhDs and get a solution in as fast as 30 minutes*
Provide a complete and elaborate solution. Show step by step solution
Consider the figure below. If block A and B have masses of 30 and 40 kg respectively and static friction coefficients of 0.15 and 0.25 respectively as well, what minimum weight of block C is required for there to be a movement up the incline? Kinetic friction coefficient is both 0.10. Next, if block C has a mass of 20 kg, what will be the acceleration and direction of movement of the blocks?

*arrow_forward*

Explain the laws of Static Friction.

*arrow_forward*

A pile-driver hammer has a mass of 300 kg and is to be raised 16 m in 4 sec. The total friction on the guides is constant at 400 N. What constant pull must be exerted on the cable?

*arrow_forward*

A uniform ladder 18 ft long and weighing 120 lbs rests against a smooth wall. The angle between the ladder and the ground is 70°. The coefficient of friction between the ground and the ladder is 0.25. How far up the ladder can a 180 lb man walk before the ladder slips?

*arrow_forward*

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- SEE MORE QUESTIONS

*arrow_forward_ios*

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ISBN:9781118807330

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Elements Of Electromagnetics

Mechanical Engineering

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:9780134319650

Author:Russell C. Hibbeler

Publisher:PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:9781259822674

Author:Yunus A. Cengel Dr., Michael A. Boles

Publisher:McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:9781118170519

Author:Norman S. Nise

Publisher:WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:9781118807330

Author:James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:WILEY