Two identical books each with k pages are placed on the table in a way that the each page of book A is between the pages of book b. The high half of book B is on top of book A.

Given that 1) the coefficient of static friction on the surface of card A is mu; 2) Each page of the book has a mass of m; 3) Book A does not move from the table. What is the minimum amount of horizontal force applied to book B in order to pull it out of book A?

Solution Preview

book B book A
-------------- 1st page, M1=m=(2*1-1)*m
-----------------
--------------- 2nd page, M2=3m=(2*2-1)*m
...

Solution Summary

This solution includes an explanation and calculations. To pull book B from book A, we have to overcome the static force which is equal to fn*mu. 120 words.

A passenger is pulling on the strap of a 17.8 kg suitcase with a force of 68.9 N. The strap makes an angle of 35.7 degrees above the horizontal. A 38.6 N frictionforce opposes the motion of the suitcase. Calculate the acceleration of the suitcase.

A locomotive is pulling three wagons along a level track with a force of 100,000 N. The wagon next to the locomotive has a mass of 80,000 kg, the next one, 50,000 kg, and the last one, 70,000 kg. Neglect friction. What is the force between the 80,000-kg and 50,000-kg wagons?
35,000 N
40,000 N
60,000 N
65

You pull your 18 kg suitcase at constant speed on a horizontal floor by exerting a 41 N force on the handle, which makes an angle θ with the horizontal. The force of friction on the suitcase is 28 N.
What is the normal force on the suitcase?
What is the coefficient of friction?

A boy drags his 60-N sled at constant speed up a 15° hill. He does so by pulling with a 25-N force on a rope attached to the sled. If the rope is inclined at 35° to the horizontal,
(a) what is the coefficient of kinetic friction between the sled and the snow?
(b) At the top of the hill, he jumps on the sled and sli

A clown weighs 890 N. The coefficient of static friction between the clown's feet and the ground is 0.53. He pulls vertically downward on a rope that passes around three pulleys and is tied around his feet. What is the minimum pullingforce that the clown must exert to yank his feet out from under himself?

If the coefficient of kinetic friction between a 12.0 kg crate and the floor is .30, what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if the force of friction is zero?

A block of weight mg sits on an inclined plane as shown. A force of magnitude F is applied to pull the block up the incline at constant speed. The coefficient of kinetic friction between the plane and the block is Mu.
What is the total work done on the block by the force of friction as the block moves a distance L up the

A 50-kg sled is pulled 20 meters over ice at a constant speed. The coefficient of friction between the sled and the ice is 0.13.
A) What is the frictional force?
B) How much work is done in pulling the sled 20 meters?

1. A father pulls his young daughter on a sled with constant velocity on a level surface through a distance of 25 m. The total mass of the sled and the girl is 45 kg and the coefficient of kinetic friction between the sled runners and the snow is .35
The force exerted by the man is applied at an angle of 30 degrees with resp