Hooke's law is valid for

Bulk Modulus for a perfectly rigid body is

Which of the following is a non-contact force ?

An object is launched horizontally from a height of 45 m above the ground with a speed of 10 m/s. The time at which the object will hit the ground is: (Take g = 10 m/s²)

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

A car travels a total distance L. It travels half the distance with speed v1​ and the other half with speed v2​. The average speed of the car is: