The displacement is zero when the initial and final postions are _______.

Assertion: Displacement of a body may be zero when distance travelled by it is not zero. Reason: The displacement is the shortest distance between initial and final position.

Give one example where the displacement is zero but the distance travelled is not zero.

If the mass of each molecule of a gas is halved and speed is doubled , find the ratio of initial and final pressure.

A ball is given a speed v on a rough horizontal surface. The ball travels through a distance l on the surface and stops. A. What are the initial and final kinetic energies of the ball? b. What is the work done by the kinetic friction?

Consider the motio of the tip of the minute hand of a clock . In one hour (i) the displacement is zero (ii) the distance covered is zero (iii) the average speed is zero (iv) the average velocity is zero

When a double displacement reaction takes place , one of the products must be ______.

Find whether the following sentences are true or false.If false Correct the statement: The difference between initial state and the final state is called change.

In a simple harmonic motion, when the displacement it one- half of the amplitude, what fraction of the total energy (E) is kinetic ?