A bob of mass m is tied with a light rope and is oscillating about the mean position M. If A and B are the extreme positions, then Horizontal acceleration of the bob at A is

A bob of mass ' m ' is suspended by a light string of length ' L '. It is imparted a minimum horizontal velocity at the lowest point A such that it just completes half circle reaching the top most position B. The ratio of kinetic energies ( K.E. )A( K.E. )B is :

a bob of mass m is tied by a massless string whose other end portion is wound on a fly wheel (disc) of radius r and mass m. When released from rest the bob starts falling vertically. When it has covered a distance of h, the angular speed of the wheel will be :

(c) the tension of the string when the bob is at point B.

Two blocks A and B of masses 3 m and m respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively :-    [2017]A: B: g, gC: D:

A mass  M , attached to a horizontal spring, executes S.H.M. with amplitude  A1 . When the mass  M  passes through its mean position then a smaller mass  m  is placed over it and both of them move together with amplitude  A2 . The ratio of  (A1A2)  is.