Work and energy

Work and Energy Worksheet-1

1. Work is measured as a product of ............... and ..............

2. The work done on a body moving in a circular path is ..............

3. 1 joule is the work done when a force of one .............. moves an object through a distance of one ............ in the direction of ............

4. The ability of a body to do work is called ..................... The ability of a body to do work because of its  motion is called ................

5. The sum of the potential and kinetic energies of a body is called ............... energy.

Work and Energy Worksheet-2

1. How much work is done by a force of 10 N in moving an object through a distance of 1 m in the direction of the force?

A. 10 joules        B. 1 joule            C. 0 joule           D. None of these

2. Calculate the work done in lifting 200 kg of water through a vertical height of 6 meters (Assume g = 10 m/s²).

A. 1200 J           B. 12000 J         C. 120 J              D. 0 J

Work and Energy Worksheet-3

11. An electric bulb consumes 7.2 kJ of electrical energy in 2 minutes. What is the power of the electric bulb ?

A. 60 watts                                     B. 3600 watts

C. 600 watts                                  D. 60 kilowatts

12. A radio set of 60 watts runs for 50 hours.  How many 'units' (kWh) of electrical energy are consumed ?

A. 3                     B. 30                   C. 300                D. 3000