List of top Physical Sciences Questions on Speed and velocity

Which is/are correct for \(γ\)-ray?

An object is sliding down an inclined plane. The velocity changes at a constant rate from 10 cm/s to 15 cm/s in two seconds. What is its acceleration ?

A boy throws a ball straight up at a velocity 10 m/s and catches it when it returns. What will be the velocity of the ball just before the boy catches it?

Velocity-time graph of a body is given. Which of the following statements are true?

Approximate velocity of sound in air at room temperature is