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3 years ago

12. A boy of mass 50 kg running 5m/s jumps on to a 20kg trolley

Physics

1 answer:

atroni [7]3 years ago

7 0

Answer:

4 m/s

Explanation:

Momentum is conserved.

m₁ v₁ + m₂ v₂ = (m₁ + m₂) v

(50)(5) + (20)(1.5) = (50 + 20) v

v = 4

The final velocity is 4 m/s.

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Answer:

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Explanation:

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3 years ago

What is the final velocity, in meters per second, of a freight train that accelerates at a rate of 0.085 m/s2 for 7.5 min, start

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3 years ago

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Answer:

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Explanation:

given,

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