A 1.00 kg block sits on a 4.00 kg block which rests on a smooth table. A force of 12.0 N acts at an angle of 25.0° to the horizontal on block M1 and causes both blocks to move with the same acceleration. i. Draw the free body diagram for each block.  Determine: ii. the acceleration of each block,  iii. the normal force exerted by the table on M1, and  iv. the magnitude of the frictional force between the two blocks.

2. You are moving the box (m=1Okg) across a rough floor by pushing on it at an angle of 20° below the horizontal with force of magnitude F=100N. What is the coefficient of kinetic friction between the box and the floor if it is moving at constant velocity? Present free-body diagram. 10°

1. Two boxes are in contact with each other, sitting on a flat surface. The mass of box 1 is mı= 8.75 kg, and the mass of box 2 is m2=5.50 kg. Box 1 is pushed with an external force of 33.0 N, in the direction of box 2, as seen in the image below. Assume you can ignore friction. m1 m2 (a) Draw and label a free body diagram for m1. (b) Draw and label a free body diagram for m2. (c) Find the magnitude of the force with which box 2 pushes on box 1. (d) Find the acceleration of the system

A100-kg sofa needs to be moved across a level floor. The coefficient of static friction between the sofa and the floor is 0.40. Two physics students decide to apply a force F!" on the sofa. One student recommends that the force be applied upward at an angle theta above the horizontal. The other student recommends that the force be applied downward at an angle theta below the horizontal. Explain which student has the better idea and why.