Two simple pendulum `A` and `B` having lengths `l` and `l//4` respectively are released from the positions as shown in figure. Calculate the time after which the release of the two strings become parallel for the first time. Angle `theta` is very small.

Two simple pendulums A and B having lengths l and (l)/(4) respectively are released from the position as shown in Fig. Calculate the time (in seconds) after which the two strings become parallel for the first time. (Take l=(90)/(pi^2) m and g=10(m)/(s^2) .

Two simple pendulums A and B have length 4l and l respectively. They are released from rest from the position shown. Both the angles alpha " and " beta are small. Calculate the time after which the two string become parallel for the first time if- (a) alpha=beta " " (b) beta=1.5 alpha

A simple pendulum A and a homogeneous rod B hinged at its enda are released from horizontal position as shown in figure.

Two simple pendulum of length l and 16l are released from the same phase together. They will be at the same time phase after a minimum time.

A ball of mass 1 kg is attached to an inextensible string. The ball is released from the position shown in figure. Find the impulse imparted by the string to the ball immediately after the string becomes taut.

Two simple pendulum have lengths land ( 25l)/( 16) . At t=0 they are in same phase after how may oscillations of smaller pendulum will they be again in phase for first time ?