index-short questions, Rotatory and Circular Motion, Physics 11

Conceptual Questions on Rotatory and Circular Motion

This page consists of solved conceptual questions on Rotatory and Circular Motion included in the course of Physics for Grade 11.

Q 1	Why is the fly wheel of an engine made heavy in the rim? See Answer
Q 2	Why is a rifle barrel ‘rifled’? See Answer
Q 3	Is it possible for a person to distinguish between a raw egg and a hard boiled one by spinning each on a table? Explain. See Answer
Q 4	Why is the acceleration of a body moving in a circle, directed towards the center? See Answer
Q 5	A ball is just supported by a string without breaking. If it is set in swinging, it breaks. Why? See Answer
Q 6	An insect is sitting close to the axis of a wheel. If the friction between the insect and the wheel is very small, describe the motion of the insect when the wheel starts rotating. See Answer
Q 7	Explain how many minimum number of geo-stationary satellites are required for global coverage of T.V transmission? See Answer
Q 8	Explain the significance of moment of inertia in rotatory motion. See Answer
Q 9	Why does the coasting rotating system slow down as water drops into the beaker? See Answer
Q 10	A body will be weightless when the elevator falls down just like a free falling body. Explain. See Answer
Q 11	When a tractor moves with uniform velocity, its heavier wheel rotates slowly than its lighter wheel, why? Explain. See Answer