Q6 of 54 Page 135

A mass of 1 kg is lifted up to height of 4 meters then the work done will be (g = 10 m/s²) :

Given:
mass(m) = 1kg

Displacement (s) = 4m

Work done = F × S = mg × h = mgh

= 1 × 10 × 4 = 40J

An object of mass m is situated at height h from the earth surface then its value of potential energy will be :

Unit of power is :

The value of the energy of the body which is falling freely towards the earth will be :

if the velocity of an object is doubled then what will be kinetic energy :

A mass of 1 kg is lifted up to height of 4 meters then the work done will be (g = 10 m/s2) :