Free Printable work and energy

1.

When a ball is dropped from a height, and it falls to the ground, what happens to the kinetic energy?

a)

It gets converted into light energy

b)

It gets converted into sound and heat energy

c)

It gets converted into potential energy

d)

It gets nullified.

2.

Is wind a non-renewable source of energy

a)

True

b)

False

3.

Two army persons A and B each of weight of 500N climb up a rope through a height of 10m.

A takes 20s while B takes 40s to achieve this task. what is ratio of the power of person A and B?

a)

1:2

b)

1:4

c)

2:1

d)

14:1

4.

When a coil spring is compressed, the work is done on the spring. the elastic potential energy

a)

Increases

b)

Decreases

c)

Disappears

d)

Remain unchanged

5.

Water stored in a dam possesses

a)

(a) no energy

b)

(b) electrical energy

c)

(c) kinetic energy

d)

(d) potential energy

6.

When I say Kinetic you think

a)

waves

b)

power

c)

motion

d)

apples

7.

The expression for kinetic energy ( $K_E$ )is:

a)

$K_E=2^{-1}\cdot m\cdot v^2$

b)

$K_E=m\cdot g\cdot h$

c)

$K_E=12\cdot m\cdot g\cdot h$

d)

$K_E=\frac{1}{2}\cdot m\cdot v^{ }$

8.

WORK IS DEFINED AS-----------

a)

PRODUCT OF FORCE ABD DISPLACEMENT

b)

MASS * ACCELERATION

c)

M*G

d)

ALL

9.

ENERGY IS A----QUANTITY

a)

SCALOR

b)

VECTOR

c)

BOTH A AND B

d)

NONE OF THESE

10.

A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 ms²)

(a) 6 × 10³ J

(b) 6 J

(c) 0.6 J

(d) zero

a)

a

b)

b

c)

c

d)

d

11.

Natural Sources of Light Energy :-

a)

LED

b)

Sun

c)

Fireflies

d)

Human Beings

12.

Identify whether work is done or not in the picture

a)

Yes

b)

No

13.

Which energy is used by plants?

a)

Potential energy

b)

Light energy

c)

Kinetic energy

14.

Which energy do we get from burning of fuels?

a)

Wind energy

b)

Heat energy

c)

Sound energy

15.

Windmill converts ______ energy into ______ energy.

a)

solar energy into electrical energy

b)

wind energy into electrical energy

c)

wind energy into solar energy

16.

Energy possessed by a body by virtue of its motion is called :

a)

Potential energy

b)

Kinetic energy

c)

Gravitational energy

d)

None

17.

Commercial unit of Power is?

a)

Unit

b)

KW

c)

Kwh

d)

Both A and C

18.

1 KiloJoule is equal to?

a)

100 Joules

b)

10 Joules

c)

100 Newtonmeters

d)

1000 Newton meters

19.

Unit of work is?

a)

Newton meter

b)

Newton meter square

c)

Newton/meter

d)

Meter/Newton

20.

Formula of work is?

a)

W = Fa

b)

W = Fs

c)

W = Fm

d)

W = Fms

work and energy

Total questions: 20

Worksheet time: 13mins

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