1. A 12 kg box sits on top of a 38 kg box. C (a) Draw an FBD for each box. (b) Calculate the normal force acting on the 12 kg box. [ans: 120 N [up]] (c) Calculate the normal force acting on the 38 kg box due to the floor. [ans: 490 N [up]]

2. A 16.5-lb block B rests as shown on a 33-lb bracket A. The coefficients of friction are µs = block B and bracket A, and there is no friction in the pulley or between the bracket and the horizontal surface 0.35 and u = 0.28 between a. Determine the maximum weight of block C if block B not slide on bracket A. b. If the weight of block C is 10 percent larger than the answer found in a, determine the accelerates of A, B and C. A B 4/ 4 ...

2. A man pushes a crate of mass 70kg along a horizontal floor with a constant horizontal force in an easterly direction. Starting from rest, the trunk. reaches a velocity of 1.5 m/s (E) after 3.0s. The coefficiant of Kinetic friction between the crate and the floor is 0.34. Determine the man's horizontal applied force. Be sure to draw a free body diagram fram and indicate positive direction.

1. A block of mass 3.00-kg is pushed against a wall by a force P that makes an angle of 50.00 with the horizontal as shown in the figure below. The coefficient of static friction between the block and the wall is 0.250. Determine the possible values for the magnitude of P that allow the block to remain stationary.

1. Suppose a block with mass 2.00 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is 0.370, what maximum angle can the ramp make with the horizontal before the block starts to slip down? UMC T UC KI

A 882 N sign is hung symmetrically by 3 cables that each make an angle of 69° to the horizontal. How much is the vertical component of the tension force in each cable? Answer: 294 N Check Correct Marks for this submission: 1.00/1.00. tension force in each cable? Answer: 91.5N Check x

3 14 F The horizontal force F pulls a heavy suspended mass to the side. al force p DO In static equilibrium, the angle is constant. If m = 74.70 kg, and the angle = 33.60 degrees, then what is F? (in N) OA: 303.99 B: 355.67 OC: 416.13 OD: 486.88 OE: 569.64 OF: 666.48 OG: 779.79 OH: 912.35

6. A 60 kg man jumps 1.00 m down onto a concrete walkway. His downward motion stops in 0.0200 seconds. If he forgets to bend his knees, what force is transmitted to his leg bones? [Hint: Solve for the velocity of the man at instant his feet strike the ground using free-fall formulas. Solve for acceleration as he brought into rest. Then apply newton's second law.]

2.A dockworker applies a constant horizontal force of 80.0 N toa block of ice on a smooth horizontal floor. The frictional force is negligible.The block starts from rest and moves 11.0 m in 5.00 s. (a) What isthe mass of the block of ice? (b) If the worker stops pushing at the endof 5.00 s, how far does the block move in the next 5.00 s?

A 40 kg horizontal bar is rested on the ledge and supported by a cable. A 70 kg block is hanging from the right end of the bar. The bar has a length L and is at rest.  a) Find the tension in the cable. b) Find the normal force of the ledge on the bar.