Which one of the following statements qualitatively explains the second law of motion?

Which of the following is a non-contact force ?

A particle is found to be at rest when observed from a reference frame S1 and the same particle is found to move with a constant velocity when observed from another frame S2. Which of the following s…

Given below are two statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A): In simple harmonic motion, the potential energy of the particle is maximum at the…

A truck starts from rest down a hill with a constant acceleration. It achieves 400 meters in 20 seconds. If the weight of the truck is 7 tons then what will be the force acting on it?

A girl is swinging on a swing in sitting position. When the girl stands up, the period of the swing will :