Question

If a car having mass 4500kg having velocity 5m/s strikes on a bus having mass 50,000kg then with what velocity bus will go ahead?

Pls answer fast​

Answer 1

Explanation:

Initial Velocity, u=54km/hr=15m/s

Final velocity , v=72km/hr=20m/s

Mass =1500kg

Initial kinetic energy

2

1

mu

2

⇒

2

1

1500×15×15=168750J

Final kinetic energy

2

1

mv

2

⇒

2

1

1500×20×20=300000J

So, change in kinetic energy = work done=300000−168750=131250J

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