What type of friction acts when a snooker ball is moving on a pool table. a) Static friction b)Sliding friction c) Rolling friction d) None of these

Protons and neutrons are found within the nucleus of an atom

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

The energy equivalent of the rest mass of an electron is