Q. After a day of testing race cars, you decide to take your own 1420 kg car onto the test track. While moving down the track at 10 m/s, you regularly accelerate to 32m/s in 10 s. What is the average net force that you have applied to car during the 10s interval?
Q. Suppose a 6g bullet travelling at 100m/s strikes a bulletproof vest and comes to rest in about 600 microseconds. What average force will it impart to happy wearer?