Circular Motion PYQs - Last 5 Years

An electron is moving in a circle of radius
2m with speed of 4 m/s. Find the
acceleration of the electron.

Assertion : For looping a vertical loop of radius, \(r\) the minimum velocity at lowest point should be \(\sqrt{5 g r}\).
Reason : In this event the velocity at the highest point will be zero.

The particle of mass \(m\) is moving in a circular path of constant radius \(r\) such that its centripetal acceleration \(a_c\) is varying with time \(t\) as \(a_c=k^2 r t^2\), where \(k\) is a constant. The power delivered to particle by t...