Question

Suppose you have to move a heavy crate of weight 875 N by sliding it along...

Suppose you have to move a heavy crate of weight 875 N by sliding it along a horizontal concrete floor. You push the crate to the right with a horizontal force of magnitude 300 N, but friction prevents the crate from sliding. What is the magnitude

Fp of the minimum force you need to exert on the crate to make it start sliding along the floor? Let the coefficient of static friction ?s between the crate and the floor be 0.56 and that of kinetic friction, ?k, be 0.47.

Homework Answers

Answer #1

Given data

Weight of the crate is, mg = 875 N

Magnitude of applied force is, F = 300 N

Coefficient of static friction is, ?s = 0.56

Coefficient of kinetic friction is, ?k = 0.47

Let the minimum force required to move the crate be Fp

Solution:

The static frictional force is,

fs = ?s mg

= (0.56 ) (875 N)

= 490 N

For the crate to slide, we need to apply atlest Fp= 490 N

-----------------------------------------------------------------------------

The kinetic frictional force is,

fk = ?k mg

= (0.47 ) (875 N)

= 411.25 N

After the crate slides, the force required to keep the crate to move

with constant speed is 411.25 N

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A crate of 31.6-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal...
A crate of 31.6-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 309 N . After that you must reduce your push to 248 N to keep it moving at a steady 22.0 cm/s What is the coefficient of static friction between the crate and the floor? What is the coefficient of kinetic friction between the crate and the floor?...
A crate of 41.3-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal...
A crate of 41.3-kg tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move when your force exceeds 337 N . After that you must reduce your push to 202 N to keep it moving at a steady 20.0 cm/s . Part A.) What is the coefficient of static friction between the crate and the floor? (static fraction=???) Part B.) What is the coefficient of kinetic...
Static and Kinetic Friction A 25 kg crate is placed on a concrete surface. If the...
Static and Kinetic Friction A 25 kg crate is placed on a concrete surface. If the coefficient of static friction is 0.60, how much horizontal force is needed to push the crate from rest? If it takes a horizontal force of 78 N to keep the crate moving at constant velocity, what is the coefficient of kinetic friction?
A 25 kg crate is placed on a concrete surface. If the coefficient of static friction...
A 25 kg crate is placed on a concrete surface. If the coefficient of static friction is 0.60, how much horizontal force is needed to push the crate from rest? If it takes a horizontal force of 78 N to keep the crate moving at constant velocity, what is the coefficient of kinetic friction?
A 35 kg crate is at rest on the floor. A man attempts to push it...
A 35 kg crate is at rest on the floor. A man attempts to push it across the floor by applying a 100 N force horizontally. (a) Take the coefficient of static friction between the crate and the floor to be 0.37 and show that the crate does not move. (b) A second man helps by pulling up on the crate. Calculate the minimum vertical force he must apply so that the crate starts to move across the floor. (c)...
A factory worker moves a 21.0 kg crate a distance of 4.80 m along a level...
A factory worker moves a 21.0 kg crate a distance of 4.80 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.300. What magnitude of force must the worker apply? (N) How much work is done on the crate by the worker's push? (J) How much work is done on the crate by friction? (J) How much work is done by the normal force?...
A factory worker pushes a 29.8 kg crate a distance of 5.0 m along a level...
A factory worker pushes a 29.8 kg crate a distance of 5.0 m along a level floor at constant velocity by pushing downward at an angle of 30 ∘ below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. 1.What magnitude of force must the worker apply to move the crate at constant velocity? 2.How much work is done on the crate by this force when the crate is pushed a distance of 5.0 m...
A 50 astronaut on Mars pushes a large crate at constant velocity as hard as she...
A 50 astronaut on Mars pushes a large crate at constant velocity as hard as she can without her feet slipping. The coefficient of static friction between her feet and floor is 0.8. The coefficient of kinetic friction between the crate and floor is 0.4. (a) What is the largest crate mass she can push? Explain. (b) If she applies the maximum push force she can exert, but the crate mass is reduced to half the value found in part,...
A factory worker pushes a 29.8 kg crate a distance of 5.0 m along a level...
A factory worker pushes a 29.8 kg crate a distance of 5.0 m along a level floor at constant velocity by pushing downward at an angle of 30 ∘ below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. 1.What magnitude of force must the worker apply to move the crate at constant velocity? 2.How much work is done on the crate by this force when the crate is pushed a distance of 5.0 m...
A factory worker moves a 29.0 kg crate a distance of 5.30 m along a level...
A factory worker moves a 29.0 kg crate a distance of 5.30 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.300. a) What magnitude of force must the worker apply? b) How much work is done on the crate by the worker's push? c) How much work is done on the crate by friction? d) How much work is done by the normal...