A body is droppped freely from the window of a railway car . Will the time of free fall be equal if .
(i) the car is stationary. (ii) the car moves with a constant velocity v.
(iii) the car moves with an acceleration a ?

What is the acceleration of the race car that moves at constant velocity of 300 km/h ?

The period of a simple pendulum suspended from the ceiling of a car is T when the car is at rest. If the car moves with a constant acceleration the period of the pendulum

A simple pendulum in a stationary lift has time period T. What would be the effect on the period when the lift (i) moves up with uniform velocity (ii) moves down with uniform velocity (iii) moves up with uniform acceleration 'a' (iv) moves down with uniform acceleration 'a' (v) begins to fall freely under gravity?

Give the magnitude and direction of the net force acting on a car moving with a constant velocity of 30km/h on a rough road

A bob is hanging over a pulley inside a car through a string. The second end of the string is in the hand of a person standing in the car. The car is moving with constant acceleration 'a' directed horizontally as shown in figure. Other end of the string is pulled with constant acceleration 'a' vertically. The tension in the string is equal to