2) A block of mass m is placed on top of a block of mass M. A horizontal force F is applied to block M and block m is tied to the wall. The coefficient of friction between all surfaces is µz- a) Draw a free body diagram for each block. b) Identify all newton's third law pair forces. c) Determine the tension in the string connecting block m to the wall.

7) A box of mass m is placed in front of a shopping cart of mass M and then the cart is pushed with a force F to the left. a) What would the size of the force F need to be if the box is not to slide to the ground and the coefficient of static friction between the box and the cart is u₂? b) What is the size of the contact force between the cart and the box? m M F

2) A small block of mass m rests on the rough, sloping side of a triangular block of mass M which itself rest on a horizontal table as shown. (a). Draw a free-body diagram for each of the two obiects. (b) Write out Newton's equations of motion for each object in both r and y coordinates. (c) If the coefficient of static friction between the wedge and the table is 0 and the coefficient of static friction between the block and the wedge is M, determine the horizontal force F applied to M that will cause the small block m to start moving up the incline.

You are pushing a box at a constant speed. You stop pushing and the box slows down. This is because: a)  Kinetic friction acts opposite to the box’s velocity. b)  Static friction acts opposite to the box’s velocity. c)  The box’s inertia tends to bring it to rest. d)  The net force on the box is zero.