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6. Work, Energy and Power
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Q6 of 13 Page 134

Write two points of difference between electric energy and electric power


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4

Two bodies of masses m1 and m2 have the same linear momentum. What is the ratio of their kinetic energies?

5

5 examples of negative work done.

7

Two identical balls each of mass 4kg are moving towards each other with speeds 2 ms–1 and 3 ms–1 respectively. They undergo head on perfectly elastic collision. Then impulse imparted by one ball on other is

8

A running man has half the kinetic energy that a boy half his mass has. The man speeds up by 1.0ms–1 and then has the same energy as the boy. What were the original speed of the man and the boy?

Questions · 13
6. Work, Energy and Power
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