Question

A truck of mass 1500000g moves with a velocity of 15m/s,east It's velocity becomes 10m/s after 5 seconds

a) what is the initial momentum and final momentum of the truck

b) what is the change in momentum

c) what is the rate of change of momentum

d) what is the direction of the momentum.why​

Answer 1

Answer:

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Explanation:

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Answer 2

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(a) Initial Momentum

• mass × Velocity

→ 1500 × 15

→ 22500 kg.m/s

Final Momentum

→ 1500 × 10

→ 15000 kg.m/s

$b) \: change \: in \: momentum \: = \: mv \: - \: mu \\ \\ = > 15 \times {10}^{2} \times 10 - 15 \times {10}^{2} \times 15 \\ \\ = > 150 \times {10}^{2} - 225 \times {10}^{2} \\ \\ = > - 75 \: kg.m. {s}^{ - 1}$

c) Rate of change of Momentum,

• dp/dt

→ (Final - Initial)/dt

→ -75/5

→ -15 kg.m/s² (N)

d) Opposite to the direction of the motion, because change in momentum results in negative sign .