A simple pendulum, suspended from the roof of a car. is Oscillating, Estimate the time period of pendulum when the car moves in a circular path at a constant speed?

A simple pendulum is suspended from the roof of a car moving horizontally with an acceleration of 10m*s^(-2) . What will be the angle made by the pendulum in its equilibrium position with the vertical ? [g= 10 m*s^(-2) ]

A body is suspended from the roof of a train by a string. What angle is formed by the string with the vertical, when the train moves at a constant acceleration of a ?

How will the time period of a simple pendulum change when its length is doubled?

What will be the percentage increase in the time period of a simple pendulum when its length is increased by 21% ?

A particle moves along a circular path of radius 7 cm. Estimate the distance covered and displacement when the particle (i) covers half circular path and (ii) completes the total circular path once.