An imaginary co-ordinate system which is either at rest or in uniform motion and where Newton’s laws are valid is called an

One complete revolution angular displacement of 'p' in 'T' seconds is equal to

1  revolution =

A cosmonaut is orbiting earth in a spacecraft at an altitude h= 630km with a speed of 8kms^-1. If the radius of the earth is 6400 km, the acceleration of the cosmonaut is

A car is racing on a circular track of 180m radius with a speed of 32 ms^-1. What should be the banking angle of the road to avoid chances of skidding of the vehicle at this speed without taking into consideration the friction between the tyre and  the road?

The force which continuously deflects a particle from its straight line path and makes it travel along a circular path is called

Angular velocity of hour hand of a watch is

A stone tied to one end of spring 80 cm long is whirled in a horizontal circle with a constant speed. If stone makes 25 revolutions in 14s, the magnitude of acceleration of stone is

Angular velocity of minute hand of a clock is

Name the physical quantity which undergoes a change with time in a periodic motion .