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 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 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

Two simple pendulums of length 1m and 1.21 m are started oscillating from some position. Find the minimum time (in second) after which they again start from same position.

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 ?

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 ?

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.

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.

Two balls of mass m and 2m are attached with strings of length 2L and L respectively. They are released from horizontal position. Find ratio of tensions in the string when the acceleration of both is only in vertical direction :