Question

A track and field runner warming up for a game runs along a track. He runs 50m North and then runs 30m back toward the starting point before stopping to talk to the coach. If he runs 20 s, determine the average velocity
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Answer 1

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11th

Physics

Work, Energy and Power

Collisions in Two Dimensions

A railway wagon of mass 200...

PHYSICS

A railway wagon of mass 2000 kg moving with a velocity of 18 km/h collides head-on with stationary wagon of mass 3000 kg. If the two wagons move together after collision, calculate (i) their common velocity and (ii) loss of kinetic energy due to collision.

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ANSWER

M

1

=2000kg M

2

=3000kg and v

1

=18km/h=5m/s and v

2

=0

Let final common velocity be v

=15000=15kJ