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2. Force and Laws of Motion
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Q36 of 124 Page 56

Define momentum of a body, on what factors does the momentum of a body depend?

Momentum is defined as amount of motion a body contains. Mathematically it is defined as the product of mass and velocity. So the factors on which momentum of a body depends are its mass and velocity.


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Explain why, it is dangerous to jump out of a moving bus.

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What is the momentum in kg. m/s of a 10 kg car travelling at

(a) 5 m/s (b) 20 cm/s, and (c) 36 km/h?

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Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.

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| Define the term ‘force.’

Questions · 124
2. Force and Laws of Motion
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