In an experiment with bar pendulum having four holes, the same time period is recorded when it is suspended at distances `21cm, 24cm, 40cm` nad `52cm` respectively form one end. The length of bar pendulum is

The length of the simple pendulum is 40 cm. Calculate its time period.

A steel bar AB of mass 10 kg and length 1 m is kept horizontal by supporting it at the two ends. Two weights of 4 kg and 6 kg are suspended from points of the bar at distances 30 cm and 80 cm respectively from the end A. The reaction at the end A is

A steel bar AB of mass 10 kg and length 1 m is kept horizontal by supporting it at the two ends. Two weights of 4 kg and 6 kg are suspended from points of the bar at distances 30 cm and 80 cm respectively from the end A. The reaction at the end A is

The length of the pendulum is increased by 90 cm and period is doubled then it's original length will be

Choose the correct options A steel bar AB of mass 10 kg and length 1 m is kept horizontal by supporting it at the two ends. Two weights of 4 kg and 6 kg are suspended from points of the bar at distances 30 cm and 80 cm respectively from the end A. The reaction at A is

While oscillating a distance of 88 cm,a pendulum subtends an angle of 60^@ at the centre.Find the length of the pendulum.

Three simple pendulums have length of strings 49cms, 48 cms and 47 cms with diameters of the bobs 2cms, 4 cm and 6 cm respectively. Then their periods are in the ratio

In an experiment to find the focal length of a concave mirror, an object is placed at a distance of 40 cm from it and forms image at 24 cm from the mirror, then the focal length is