1. The earth moving around the sun in a circular orbit is acted upon by a force and hence work must be done on the earth by the force.
Correct Answer is : FALSE
2. A force can do no work on a body, yet the body can move under accelerated motion.
3. The water at the foot of the fall will be at a different temperature from that at the top.
4. What sort of energy does flying bird posses?
Correct Answer is : Both potential and kinetic energy
5. When a spring is compressed or stretched, the potential energy of the spring
Correct Answer is : Increases