Q. A 1600 kg car is traveling along a straight road at 17 m/s. Two seconds later its speed is 24m/s. What is the magnitude of the net force on the car during this time?
Q. An 80 kg runner accelerates out of the starting block at the rate of 2.0 m/s2. He reaches his top speed in 10 seconds.
(a What force must the runner exert so that he can achieve his acceleration?
(b What is the runner's weight?
(c What is the runner's top speed?
(d What is the runner's momentum when he runs at his top speed?
(e If the runner continues at top speed around a turn whose radius is 75m, what is his angular momentum?