Question

A loaded lorry of mass 12000 kg moves with a velocity of 12m/s. Its velocity becomes 10m/s after 5 s.
a)What is the Initial momentum and final momentum? ​

Answer 1

Explanation:

Mass = 12000kg

u = 12 m/s

v = 10 m/s

t = 5s

Initial momentum = mu = 12000 *12 = 144000 kg m/s

final momentum = mv = 12000*10 = 120000 kg m/s

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Answer 2

Answer:

Initial P = 12000 kgm/s^2

Final P = 144000 kgm/s^2

Explanation:

m = 12000 kg

u = 12 m/s

v = 10 m/s

Change in P = mv-mu/t

= 12000×10 - 12000×12 / 5

= 120000 - 144000 / 5 = -4800 kgm/s^2

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