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A Heavy Car a of Mass 2000 Kg Travelling at 10 M/S Has a Head-on Collision with a Sports Car B of Mass 500 Kg. If Both Cars Stop Dead on Colliding, What Was the Velocity of Car B ? - CBSE Class 9 - Science

ConceptConservation of Momentum

Question

A heavy car A of mass 2000 kg travelling at 10 m/s has a head-on collision with a sports car B of mass 500 kg. If both cars stop dead on colliding, what was the velocity of car B ?

Solution

m1 × v1 = m2 × v2
m1 = 2000 kg,
v1 = 10 m/s
m2 = 500 kg
v2 = ?
2000 × 10 = 500 × v2
20000 = 500 × v2
v2 = 20000/500
= 40 m/s
The velocity of car B is 40 m/s.

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Lakhmir Singh Solution for Science for Class 9 Part 1 Physics (2016 to Current)
Chapter 2: Force and Laws of Motion
Hots Questions | Q: 59 | Page no. 77

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Solution A Heavy Car a of Mass 2000 Kg Travelling at 10 M/S Has a Head-on Collision with a Sports Car B of Mass 500 Kg. If Both Cars Stop Dead on Colliding, What Was the Velocity of Car B ? Concept: Conservation of Momentum.
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