Work and Energy Test

Result

Work and Energy Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Moon revolves around the earth due to gravitational force (F) of earth on moon. The work done by the gravitational force is (r = radius of circular orbit of moon)

A
F. 2 π r

B
F. π r

C
zero

D
negative work
Question 2
1 / -0

A load of 50 kg is pulled upward by 5 m. The work done by the external force is (g = 10 m/s2)

A
250 J

B
2500 J

C
- 250 J

D
- 2500 J
Question 3
1 / -0

A body is moved through a distance of 3 m in the following different ways. In which case is the maximum work done?

A
when pushed over an inclined plane

B
when lifted vertically upward

C
when pushed over smooth rollers

D
when pushed on a plain horizontal surface
Question 4
1 / -0

A body of mass 1 kg has a potential energy of 1 joule relative to the ground, when it is at a height of

A
0.102 m

B
1 m

C
9.8 m

D
32 m.
Question 5
1 / -0

Two bodies of equal weight are kept at heights of h and 1.5h, respectively. The ratio of their PE is

A
3 : 2

B
2 : 3

C
1 : 1

D
4 : 3
Question 6
1 / -0

A flying aeroplane possesses

A
only potential energy

B
only kinetic energy

C
both potential and kinetic energy

D
neither potential nor kinetic energy
Question 7
1 / -0

In the SI system, the unit of potential energy is

A
newton

B
joule

C
watt

D
metre per second
Question 8
1 / -0

Two particles of masses 1 g and 4 g have equal kinetic energies. What is the ratio between their momenta?

A
1 : 4

B
1 : 2

C
1 : 2

D
1 : 16
Question 9
1 / -0

Newton-metre is the unit of

A
power

B
work

C
momentum

D
gravitational intensity
Question 10
1 / -0

A force of 10 N displaces a body by 6 m in 3 seconds. The power of the agency applying the force is

A
1.8 W

B
5 W

C
180 W

D
20 W

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Re-Attempt Weekly Quiz Competition

Work and Energy Test - 3

Result

Work and Energy Test - 3

Score

-

Rank

-

SHARING IS CARING

Question 1

F. 2 π r

F. π r

zero

negative work

Question 2

250 J

2500 J

- 250 J

- 2500 J

Question 3

when pushed over an inclined plane

when lifted vertically upward

when pushed over smooth rollers

when pushed on a plain horizontal surface

Question 4

0.102 m

1 m

9.8 m

32 m.

Question 5

3 : 2

2 : 3

1 : 1

4 : 3

Question 6

only potential energy

only kinetic energy

both potential and kinetic energy

neither potential nor kinetic energy

Question 7

newton

joule

watt

metre per second

Question 8

1 : 4

1 : 2

1 : 2

1 : 16

Question 9

power

work

momentum

gravitational intensity

Question 10

1.8 W

5 W

180 W

20 W

User

Question Analysis

My Perfomance

Score

-

Rank

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