A man is standing on a sensitive balance. If he inhales deeply, the reading of the balance –

A person of mass 60 kg is standing on a spring balance inside a lift. If the lift falls freely downwards, then the reading of the spring balance will be equal to :

A car has an initial velocity of 12 m/s and is brought to rest over a distance of 45 m. The acceleration of the car is

What is the effect of pressure of a human body on sand ?

As the train starts moving, the head of the passenger sitting inside leans backward because of –

A truck, a car, and a motorcycle have equal kinetic energies. If equal stopping forces are applied and they stop after traveling a distance of X, Y and Z respectively, then –