Making skim milk is an example of

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

What is the length x of the side of the triangle below? (hint: use the cosine function)

In what direction does an applied force move an object