1.
Define a) work b) energy
2. State
the condition under which work is said to be done?
3. Name
different forms of energy?
4. Give
example of
a. Kinetic
energy
b. Potential
energy
5. State
different uses of light energy?
6. Explain
by giving example how a moving object can do work?
7. A boy
is standing with some books in his hand. Is he doing work? Give reason for your
answer.
8. What
is energy ? Describe an activity to show inter relationship between work and
energy?
9. State
the type of mechanical energy possessed by following
a. A
Bullet fired from a gun
b. The
wound up spring of a toy car
c. The
water, stored at a height in a tank
d. A
moving bus
10. Name
the device which convert
a. Electric
energy to light energy
b. Electric
energy to sound energy
c. Chemical
energy to electrical energy
11. a
potter keep standing at a place while holding a suitcase of mass 20 KG over his head for five
minutes. Has he done any work ? Give reason for your answer
12. Is
there a difference between applying force and doing work? Give reason for your answer
13. State
the law of Conservation of Energy
14. What
do you understand by transformation of energy? Give example
15. Define
the following terns
a. Kinetic
Energy
b. Potential
Energy
16. Identify
the type of Energy in following
a. Water
falling from the height
b. A
stationary ball
c. Burning
of fuel
17. Give
example of the following transformation of energy
a. Kinetic
energy into electric energy
b. Chemical
energy into light energy
18. State
the value displayed by Neha
19. Name
the process through which blue ink drops make the water informally blue
20. Let
each student think of an incident or a situation in which the efforts of one
person brought a useful or desirable change in that situation
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