1Out of a house, a tree, a flying bird, a moving bus, a running person and a bus that has stopped, which are in motion and which are at rest?
2Is the motion of every object of the same kind?
3What has to be done to bring an object into motion?
4What does it mean to say that motion and rest are relative? Give an example.
5Write four differences between speed and velocity.
6Why is speed called a scalar quantity and velocity a vector quantity?
7A car covers 500 metres in 20 seconds. What is its speed?
8The speed of sound is 332 metres per second. How far does sound travel in 3 seconds?
9Why do the roadside trees seem to move backwards when you look out of the window of a moving bus?