A spring balance measures the ________ of a body.

Spring balance measures ______ of a body in air.

A body hangs from a spring balance supported from the roof of an elevator. (a) If the elevator has an upward acceleration of 2.45 ms^(-2) and the balance reads 50N, what is the true weight of the body? (b) Under what circumstances will the balance read 30N? (c) What will be the balance reading if the elevator, cable breaks?

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49N, when the lift is stationary. If the lift moves downward with an acceleration of 5m//2^2 , the reading of the spring balance will be

A body of mass m falls from a height h onto the pan of a spring balance. The masses of the pan and spring are negligible. The force constant of the spring is k. The body sticks to the pan and oscillates simple harmonically. The amplitude of oscillation is