Work, Energy and Power Test

Result

Work, Energy and Power Test - 37

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

If a man increase his speed by 2 m/s, his K.E. is doubled, the original speed of the man is

A

B

C

D

Solution
Question 2
4 / -1

The potential energy of a particle varies with distance x as shown in the graph. The force acting on the particle is zero at

A
C

B
B

C
B and C

D
A and D

Solution
Question 3
4 / -1

A body of mass 1.5 kg slide down a curved track which is quadrant of a circle of radius 0.75 meter. All the surfaces are frictionless. If the body starts from rest, its speed at the bottom of the track is ..... ( g = 10 m/s²)

A
3. 87 m/s

B
2 m/s

C
1.5 m/s

D
0.387 m/s

Solution
Question 4
4 / -1

A body initially at rest undergoes one dimensional motion with constant acceleration. The power delivered to it at time t is proportional to.....

A
t^1/2

B
t

C
t^3/2

D
t²
Question 5
4 / -1

An electric motor develops 5 KW of power. How much time will it take to lift a water of mass 100 kg to a height of 20 m ? ( g = 10 m/s²)

A
4 sec

B
5 sec

C
8 sec

D
10 sec

Solution
Question 6
4 / -1

Bansi does a given amount of work in 30 sec. Jaimeen does the same amount of work... in 15 sec. The ratio of the output power of Bansi to the Jaimeen is....

A
1:1

B
1:2

C
2:1

D
5:3

Solution
Question 7
4 / -1

A body of mass m is accelerated uniformly from rest to a speed v in time T. The instantaneous power delivered to the body in terms of time is given by.....

A

B

C

D

Solution
Question 8
4 / -1

1 kg apple gives 25 KJ energy to a monkey. How much height he can climb by using this energy if his efficiency is 40%. (mass of monkey = 25 kg and g = 10 m/s²)

A
20m

B
4m

C
30m

D
40m

Solution
Question 9
4 / -1

A
4W

B
20 W

C
21 W

D
4.2 W

Solution
Question 10
4 / -1

A
10F₁F₂M

B
10(F₁ + F₂)M

C
(F₁ + F₂)M

D
Zero