Physics 9 Chapter 6 - Work and Energy - 10

Physics 9 Chapter 6 - Work and Energy - 10

1. A body lying at earth’s surface has P.E with respect to earth?

a) Negative
b) Half
c) zero
d) Maximum

2. A block weighing 20 N is lifted 6 m vertically upward. Calculate the potential energy stored in it?

a) 14 J
b) 26 J
c) 3.21 J
d) 120 J

3. A body of mass 50 kg is raised to a height of 3 m. What is its potential energy?

a) 1500 J
b) 15 000 J
c) 150 J
d) 500 J

4. What is the P.E. of a vertically thrown up body at maximum height?

a) Zero
b) Maximum
c) Half
d) Negative

5. When a body is lifted through a height h, the work done on it appears in the form of it’s.....................?

a) Geothermal energy
b) Kinetic energy
c) Potential energy
d) Elastic potential energy

6. What is the type of energy stored in a dam?

a) Electrical energy
b) Heat energy
c) gravitational P.E
d) Mechanical energy

7. Increase in K.E. is equal to...............?

a) Decrease in K.E
b) Increase in P.E
c) Increase in K.E
d) Decrease in P.E

8. Increase in P.E. is equal to...............?

a) Decrease in K.E
b) Increase in K.E
c) Increase in P.E
d) Decrease in P.E

9. What is the energy possessed by a body both due to its motion or position called?

a) Mechanical energy
b) Electrical energy
c) Heat energy
d) Light energy

10. A force of 200 N acts on a body of mass 20 kg. The force accelerates the body from rest until it attains a velocity of 50 ms^-1. Through what distance the force acts?

a) 100 m
b) 152 m
c) 400 m
d) 125 m

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