H C Verma Solutions for Chapter: Circular Motion, Exercise 1: QUESTIONS FOR SHORT ANSWER

You are driving a motorcycle on a horizontal road. It is moving with a uniform velocity. Is it possible to accelerate the motorcycle without putting higher petrol input rate into the engine?

Some washing machines have cloth dryers. It contains a drum in which wet clothes are kept. As the drum rotates, the water particles get separated from the cloth. The general description of this action is that "the centrifugal force throws the water particles away from the drum". Comment on this statement from the viewpoint of an observer rotating with the drum and the observer who is washing the clothes.

A bird while flying takes a left turn, where does it get the centripetal force from?

Is it necessary to express all angles in radian while using the equation$\text{ω}={\text{ω}}_0+\text{α}t$?

After a good meal at a party, you wash your hands and find that you have forgotten to bring your handkerchief. You shake your hands vigorously to remove the water as much as you can. Why is the water removed in this process?

A smooth block loosely fits in a circular tube placed on a horizontal surface. The block moves in uniform circular motion along the tube. Which wall (inner or outer) will exert a non-zero normal contact force on the block?

Consider the circular motion of the earth around the sun. Which of the following statements is more appropriate?

(a) Gravitational attraction of the sun on the earth is equal to the centripetal force.
(b) Gravitational attraction of the sun on the earth is the centripetal force.

A heavy mass $m$ is hanging from a string in equilibrium without breaking it. When the same mass is set into oscillation, the string breaks. Explain.