Q2 of 46 Page 246

The physical quantity which is equal to the rate of change of momentum is

By Newton’s second law, force is defined as the rate of change of momentum. So (iii) is correct. Displacement is the rate of change of position. Acceleration is the rate of change of velocity. Impulse measures the impact of a force, given by force multiplied by time.

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1

The acceleration in a body is due to ___________.

i) balanced force ii) unbalanced force


iii) electro static force

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The momentum of a massive object at rest is _______.

 4

The mass of a person is 50 kg. The weight of that person on the surface of the earth will

be ________.

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The freezing of biotechnology products like vaccines require ________ freezing system.