The speed of a particle moving in a circle is increasing. The dot product of its acceleration and velocity is

For a particle moving in straight line with increasing speed the appropriate sign of acceleration a and velocity v can be:

For a particle moving in straight line with increasing speed the sppropriate sign of acceleration a and velocity v can be:

A particle is moving in a circle with uniform speed its motion is

A particle is moving in a circle with uniform speed its motion is

A particle is moving in a circle with uniform speed its motion is

A particle is moving in a circle with a constant speed. Its moving is

The angular speed of a particle,moving in a circle of radius 20 cm ,increases from 2 rad //s to 40 rad//s in 19 s the ratio of its centripetal acceleration to tangential acceleration at the end of 19 s is ,

A particle is moving on a circular path with constant speed, then its acceleration will be