A small box of mass m, is sitting on a board of mass ma and length L (Eigure 1). The board rests on a frictionless horizontal surface. The coefficient of static friction between Part A the board and the box is . The coefficient of kinetic friction between the board and the box is, as usual, less than Find Fmin, the constant force with the least magnitude that must be applied to the board in order to pull the board out from under the the box (which will then fall off of the opposite end of the board). Throughout the problem, use g for the magnitude of the free-fall acceleration. In the hints, use f for the magnitude of the friction force between the board and the box. Express your answer in terms some or all of the variables 4, m1, m2. g. and L. Do not include f in your answer. > View Available Hint(s) ? Fain = Submit Provide Feedback

Q0.6

Draw the needed FBD and write the angles.

a person is trying to judge whether a picture (mass =2.59kg) is properly positioned by temporarily pressing it against a wall. the pressing force is perpendicular to the wall. the coefficient of static friction between the picture and the wall is 0.650. What is the minimum amount of pressiong force that must be used?  answe is 39N

I have a shelf full of textbookd.Each book has a mass of 1.0 kg and mus=0.3. a. How hard do I need to push horizontally to unstick the top book from the rest of the pile? b. How many books can I unstick from the top of the pile if I push with a force of 16N?

A 392-N force parallel to the plane is required to support a body on an inclined plane of height 300 m and base 400 m. If the force exerted by the plane on theb body is 780N, a. what is the weight of the body? b. what is the frictional force between the body and the plane?

Q0.2

A 525 N block is on a rough, horizontal surface with an applied horizontal force as shown in Figure 1. (a) If a force of 295N is required to start the block in motion, what is the coefficient of static friction, us? (b) If force of 205 N is required to maintain the block at constant velocity, what is the coefficient of kinetic friction, uk?

e.co CU ct sona- n ect Pool artment... W 24,919 8. A mass m₁ = 9.00 kg is connected by a light string that passes over a pulley of mass M = 14.0 kg to a mass m₂ = 12.5 kg sliding on a horizontal frictionless surface (see figure). There is no slippage between the string and the pulley. What is the magnitude of the tension that is acting on mass m₂? (The moment of inertia of the pulley is ½/Mr².) N # 3 20 $ 4 R 999 F4 % 5 FS ^ 6 tv © MacBook Air Y & 7 m₂ F7 * 8 Dall 1 ( 9 M m₁ A 02 DD ) 0 P ISULI H by mi 04 M vauies or roe puffer

A 392-N force parallel to the plane is required to support a body on an inclinedplane, of height 300 m and base 400 m. If the force exerted by the plane on thebody is 780N,a. what is the weight of the body?b. what is the frictional force between the