Work and Energy MCQ (Multiple Choice Questions) PDF Download

Potential energy and kinetic energy are types of

1. Electrical energy
2. Magnetic energy
3. Thermal energy
4. Mechanical energy

An object is lifted 5 m above the levelled ground, the mass of the object is 20 kg and the gravitational pull is 10 N kg^-2, the E_p of the object is

1. 40 J
2. 1000 J
3. 2.5 J
4. 0.4 J

The formula for the gravitational potential energy is

1. E_p = mg/h, where m is mass, g is gravitational pull and is height
2. E_p = m/gh, where m is mass, g is gravitational pull and is height
3. E_p = mgh, where m is mass, g is gravitational pull and is height
4. E_p = gh/m, where m is mass, g is gravitational pull and is height

A pendulum bob moves at a speed of 2 m s^-1 and mass of 0.5 kg, its E_k would be

1. 1 J
2. 0.25 J
3. 0.5 J
4. 2 J

Mass of a car is 500 kg, which is lifted up by a crane at a height of 200 m, the gravity is 10 N kg^-1. The E_p of the car will be

1. 1000000 J
2. 10000 J
3. 4 J
4. 25 J