Work and Energy Test

Result

Work and Energy Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

When the K.E. of a body is increased by 300%, the momentum of the body is increased by

A
120%

B
50%

C
100%

D
20%
Question 2
1 / -0

An object A of mass 10 kg has a kinetic energy equal to 180 J. What will be its momentum?

A
18 Ns

B
10 Ns

C
60 Ns

D
36 Ns
Question 3
1 / -0

What is the kinetic energy of a body of mass 0.1 kg and momentum 20 kg m/s?

A
20 KJ

B
2 J

C
2 KJ

D
200 J
Question 4
1 / -0

The ratio of the magnitudes of the linear momentum of two blocks A and B is 1 :√3. What is the ratio of their kinetic energies?

A
1 : √3

B
√3 : 1

C
1 : 3

D
1 : 2√3
Question 5
1 / -0

A body is dropped from a certain height above the ground. When it is half way down, it possesses

A
only kinetic energy

B
only potential energy

C
both kinetic and potential energy

D
no energy at all
Question 6
1 / -0

At which position does a pendulum has the highest PE?

A
At turning points of the oscillation

B
At the equilibrium position

C
Between the extreme and equilibrium positions

D
It always has a fixed value
Question 7
1 / -0

If an electric bulb of 100 watt is lighted for 2 hours, how much electric energy would be consumed?

A
7.2 × 10⁵ J

B
1.2 × 10⁴J

C
0.0138 J

D
0.83 J
Question 8
1 / -0

How much energy will an electric motor of 1 horse power consume in one second?

A
1 J

B
0.0013 J

C
746 J

D
100 J
Question 9
1 / -0

If a force F is applied on a body and it moves with a velocity v, the power will be

A
F / v

B
F × v

C
F / v²

D
Fv²
Question 10
1 / -0

A motorboat is travelling with a speed of 7.0 m/s. If the force on it due to water fall is 600 N, what will be the power of the boat?

A
4.2 KW

B
8.5 KW

C
11.7 KW

D
420 KW

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Re-Attempt Weekly Quiz Competition

Work and Energy Test - 2

Result

Work and Energy Test - 2

Score

-

Rank

-

SHARING IS CARING

Question 1

120%

50%

100%

20%

Question 2

18 Ns

10 Ns

60 Ns

36 Ns

Question 3

20 KJ

2 J

2 KJ

200 J

Question 4

1 : √3

√3 : 1

1 : 3

1 : 2√3

Question 5

only kinetic energy

only potential energy

both kinetic and potential energy

no energy at all

Question 6

At turning points of the oscillation

At the equilibrium position

Between the extreme and equilibrium positions

It always has a fixed value

Question 7

7.2 × 105 J

1.2 × 104 J

0.0138 J

0.83 J

Question 8

1 J

0.0013 J

746 J

100 J

Question 9

F / v

F × v

F / v2

Fv2

Question 10

4.2 KW

8.5 KW

11.7 KW

420 KW

User

Question Analysis

My Perfomance

Score

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7.2 × 10⁵ J

1.2 × 10⁴J

F / v²

Fv²