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MCQ: For 2 objects of the different masses moving at same speed, the object of greater mass has

1. no kinetic energy
2. greater potential energy
3. smaller kinetic energy
4. greater kinetic energy

D

MCQ: A girl accidently dropped a stone from her building, the mass os the stone is 12 g and the height is 60 m. If the air resistance can be neglected and g = 10 N kg-1, what is the speed of the stone when it hits the ground?

1. 5.6 J
2. 7.2 J
3. 3.9 J
4. 5.8 J

B

MCQ: The SI unit of work is

1. Joule
2. kg-1
3. watt
4. Newton

A

MCQ: When a body of mass m moves at a speed v, its kinetic energy is defined as

1. Ek = mv2
2. Ek = 1/2 mv
3. Ek = (1/2)mv2
4. Ek = m/v2

C

MCQ: The product of the force and the distance moved by the object in the direction of the force is known as

1. effort
2. power
3. efficiency
4. work done

D