Q1. The tortoise can run with a speed of 0.1 m/s and the hare can run with a speed of 2 m/s. They start their race at the same time, but the hare, feeling confident, stops along the way for a two minute nap, and the tortoise wins by the length of his shell, 0.2 m.
a) How much time did the race take?
b) How long was the race?
Q2. The attractive electrostatic force between the points charges 5.72×10-6 and has a magnitude of 0.91 while the separation between the charges is 4.4. Find out the sign and magnitude of the charge.