Question

Q4. At what speed does a 650 g cue need to strike a 160 g cue ball if the the ball is to be given a forward velocity of 1.5 m/s and the speed of the cue is to decrease by 90%.

Answer 1

Answer:

Explanation:

If a significant portion of the population of China (say one billion people) simultaneously jumped up at 1 m/s, how fast would the Earth recoil? Assume an average mass of 60 kg per person. (Do not use a calculator to compute your answer. This is meant to be an order of magnitude calculation.)