14. A pellet gun fires ten 2.14-g pellets per second with a speed of 483 m/s. The pellets are stopped by a rigid wall.
(a) Find the momentum of each pellet.
(b) Calculate the average force
exerted by the stream of pellets on the wall.
If each pellet is in contact with the wall for 1.25 ms, what is the
average force exerted on the wall by each pellet while in contact? Why
is this so different from (b)?