1. A boxer punches a sheet of paper in midair, bringing it from rest to a speed of 25 m/s in 0.05 s. If the mass of the paper is 0.003 kg, show that the force the boxer exerts on it is only 1.5 N. 2....

1. A boxer punches a sheet of paper in midair, bringing it from rest to a speed of 25 m/s in 0.05 s. If the mass of the paper is 0.003 kg, show that the force the boxer exerts on it is only 1.5 N.

2. Suppose that you are standing on a skateboard near a wall and you push on the wall with a force of 30 N. (a) How hard does the wall push on you? (b) Show that if your mass is 60 kg your acceleration while pushing will be 0.5 m/s².