Work and Energy

1. The type of energy derived from heated ground water is:

 
 
 
 

2. A ball weighing 50 N is lifted to a height of 5 meters. The potential energy stored in it is______

 
 
 
 

3. A 4 kg body is thrown vertically upward from the ground with a velocity of 5 ms 1. If friction is neglected its kinetic energy just before hitting the ground is__________

 
 
 
 

4. A practical engine cannot have an efficiency equal or greater than:

 
 
 
 

5. The SI unit of power is________

 
 
 
 

6. A weight lifter of power 1960 watts lifts a load of mass ‘M’ from the ground to a height of 2m in 3 seconds. ‘M’ is______

 
 
 
 

7. One unit of horsepower is equivalent to______

 
 
 
 

8. A heavy and a lighter object have the same momenta. The object with greater kinetic energy is________

 
 
 
 

9. What is the power utilized when 100 J of work is done in 5 s?

 
 
 
 

10. A ball is thrown downward with an initial velocity, its_______

 
 
 
 

11. The unit of work or energy joule (J) is equal to________

 
 
 
 

12. A force is acting on the body but causes no displacement. The work done on the body is________

 
 
 
 

13. A box is taken to the second floor of a building by doing some work. This work converts to________

 
 
 
 

14. A car, an elephant, and a cricket ball have the same kinetic energies. Which of these will have a greater speed?

 
 
 
 

15. Which one is renewable source of______

 
 
 
 

Question 1 of 15

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