A coolie A takes 1 minute to lift a load to the roof of a bus whereas coolie B take 2 minutes to lift the same load to the roof of the same bus. The work done by B is:

1. equal to work done by A
2. greater than work done by A
3. less than work done by A
4. none of the above.

One horse power is equal to :

1. 1000 W
2. 500 W
3. 764 W
4. 746 W

1 Joule is equivalent to …………… erg

1. 10⁵
2. 10⁷
3. 10⁹
4. 1

The S.I. unit of power is

1. Watt
2. Joule
3. Nm
4. Nms