Q18 of 146 Page 145

Is potential energy a vector or a scalar quantity?

Potential energy is a scalar quantity as it depends only on the magnitude and not on the direction.


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16

Two bodies A and B of equal masses are kept at heights of h and 2h respectively. What will be the ratio of their potential energies?

 17

What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s?

 19

A load of 100 kg is pulled up by 5 m. Calculate the work done (g = 9.8 m/s2)

 20

State whether the following statement is true or false:

The potential energy of a body of mass 1 kg kept at a height of 1m is 1J.