Q35 of 124 Page 55

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?

As we know,

Momentum, p = m × v


Where, m is the mass of the body


v is the velocity of the body,


Here, m = 10 kg


(a) v = 5 m/s


p = (10) × (5)


= 50 kg m/s


(b) v = 20 cm/s = 0.2 m/s


p = (10) × (0.2)


= 2 kg m/s


(c) v = 36 km/h = 10 m/s


p= (10) × (10)


= 100 kg m/s


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