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ECAT Physics Work and Energy Test Online

Maan AliLast Updated: May 26, 2025

Physics Work and Energy MCQS Online Test

ECAT Physics Work and Energy Chapter Online Test

Total Questions:	65
Time Allowed:	40 Minutes
Total Marks:	65
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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ECAT Physics Work and Energy Test Online

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Page 1 of 3

Physics

1. A bullet is shot from a rifle. As a result the rifle recoils. The kinetic energy of rifle as compared to that of bullet is

Equal

Greater

Less

Cannot be concluded

2. Power is a measure of the

Rate of change of momentum

Force which produces motion

Rate of change of energy

Change of energy

3. The type of energy possessed by a simple pendulum, when it is at the mean position is

Sound energy

Kinetic energy

Potential energy

Potential energy + kinetic energy

4. A man pushes a wall but fails to displace it. He does:

Positive work but

Maximum positive work

No work

Negative work

5. If a body a mass of 2 kg is raised vertically through 2m, then the work done will be

39.2 J

38.2 J

3.92 J

392.1 J

6. The K.E of a light and a heavy object is same. Which object has maximum momentum?

Heavy object

Light object

Data is not sufficient

Both have the same momentum

7. The field, in which is the work done is independent of the path followed, is called

Varying intensity field

Conservative fields

None of these

Non-conservative field

8. A container with a mass of 5 kg is lifted to a height of 8 m. How much work is done by the external force?

400 J

Zero

-400 J

50 J

9. Which form of energy does the flowing water possess?

Potential energy

Gravitational energy

Kinetic energy

Electrical energy

10. The P.E. of a body at a certain height is 200 J. The kinetic energy possessed by it when it just touches the surface of the earth is:

> P.E.

Cannot be known

< P.E.

= P.E.

11. The work done in taking a particle from the floor to a table depends on

The actual path taken

The speed of the particle

The height of the table

The tie taken in this work

12. An average energy used by the car from petrol in its life time

1 x 10¹² J

1 x 10¹¹ J

1 x 10¹⁰ J

1 x 10⁹ J

13. The escape velocity of moon in Kms¯¹ is

2.40

2.59

2.43

1.23

14. A meteor of mass m enters the Earth’s atmosphere at an angle θ to the horizontal with an initial velocity v. Which of the following is true about vertical component of its velocity?

None

It remains constant throughout the motion.

It increases throughout the motion

It decreases throughout the motion.

15. Name the physical quantity which is equal to the product of force and velocity.

Energy

Work

Power

Acceleration

16. A 1 kg mass has a kinetic energy of 1 joule when its speed is

1.4 m/s

1 m/s

4.4 m/s

0.45 m/s

17. When a force is parallel to the direction of motion of the body. Then work done on the body is

Infinity

Maximum

Minimum

Zero

18. Two objects of masses 1 x 10¯³ kg and 4 x 10¯³ kg have equal momentum. What is the ratio of their kinetic energies?

19:1

4:1

2:1

16:1

19. A machine does 2500 J of work in 1 min. What is the power developed by the machine?

2500 W

21 W

150 W

42 W

20. A spacecraft moves around Earth in a circular orbit with a constant radius. How much work is done by the gravitational force on the spacecraft during one revolution?

mgh

-FGd

FGd

Zero

21. The Escape velocity of Saturn in Kms¯¹

37.0

30.0

35.04

37.4

22. Kilowatt-hour commercially used to measure the consumption of

Energy produced in nuclear plants

Electrical Energy

None of these

Power of petrol engine

23. The atmosphere is held to the earth by

Winds

Clouds

The rotation of earth

Gravity

24. Which of the following is conservative field?

Frictional field

Electrostatic field

Viscous field

All of these

25. A truck driver is typing to push a loaded truck with an applied force. Unfortunately, his attempt was unsuccessful the truck stays stationary no matter how hard the driver pushes. How much work is done by the driver?

-Fd

F/d

Zero

Page 2 of 3

26. A body of mass 2 kg is dropped from a height of 1m. Its kinetic energy as it touches the ground is

19.6 kg

19.6 N

19.6 m

19.6 J

27. The Escape velocity of Mars in Kms¯¹

5.00

3.99

5.23

2.89

28. Which of the following is true?

Momentum is conserved in all collisions but not kinetic energy

Momentum is conserved in all collisions but kinetic energy is conserved only in inelastic collisions

Both momentum and kinetic energy are conserved in all collisions

Neither momentum nor kinetic energy is conserved in inelastic collisions

29. If air resistance is negligible, the sum total of potential and kinetic energies of a freely falling body ___________.

Increases

Remains the same

Becomes zero

Decreases

30. Which of the following is not a perfectly inelastic collision?

A bullet striking a bag of sand

An electron captured by a proton

A man jumping onto a moving cart

Striking of two glass balls

31. The original source of biomass energy is

None of these

Sun

Moon

Geothermal

32. An elevator weighing 3.5 x 10–6 N is raised to a height of 1000 m in the absence of friction, the work done is

3.5 x 10⁶ J

3.5 x 10⁹ J

3.5 x 10⁴ J

3.5 x 10³ J

33. The original source of hydroelectric is

Wind

Water

Moon

Sun

34. If the force applied is F and the velocity gained is v, then the power developed is

v/F

Fv²

F/v

35. One Kilowatt hour is equal

306 x 10⁵ J

3.6 x 10⁶ J

3.5 x 10⁵ J

3.5 x 10⁶ J

36. A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is (g = 10 m/s²)

50 J

600 J

500 J

60 J

37. A boat moving at constant speed v through still water experiences a total frictional drag F. What is the power developed by the boat?

0.5Fv

Fv²

0.5Fv²

38. For the same velocity, the momentum is maximum for:

An electron

A deuteron

An a particle

A proton

39. The work done is a gravitational field is independent of:

Its mass

Its path

Its potential energy

Its distance

40. A container with a mass of 5 kg is lifted to a height of 8 m. How much work is done by the gravitational force?

-400 J

50 J

Zero

400 J

41. If a body falls from a height, the relation between its kinetic and potential energies is:

Loss in P.E = Gain in K.E. – Work done against friction

Gain in P.E = Loss in K.E. + Work done against friction

Gain in K.E = Loss in P.E. – Work done against friction

Loss in K.E = Gain in P.E. + Work done against friction

42. A body of mass 10 kg is dropped to the ground from a height of 10 meters. The work done by from a height of 10 meters. The done by the gravitational force is (g = 9.8m/s²)

- 980 Joules

+ 980 Joules

+ 490 Joules

- 490 Joules

43. The unit of power is

Watt per second

Joule

Kilojoule

Joule per second

44. The relation between horse power and watt is

1 hp = 1000 watts

1 hp = 746 watts

1 hp = 546 watts

1 hp = 946 watts

45. The moon produce the tides raise the water in the se roughly

None of these

Twice a day

Several a day

Once a day

46. The Escape velocity of Earth in Kms¯¹

11.2

9.75

12.3

15.6

47. Work done is a gravitational field along a closed loop is

Minimum

Maximum

Zero

48. Work is defined as the dot product of force and displacement but it is a

Vector quantity

None of these

Scalar quantity

Constant quantity

49. The initial velocity with which a body projected upward and never comes back is called

None of these

Terminal velocity

Escape velocity

Kinetic energy

50. Reason of weightlessness in a satellite is

Zero reaction force by satellite surface

None of these

Center of mass

Zero gravity

Page 3 of 3

51. The dimension of power is

[MLT]

[M²LT¯³]

[ML²T³]

[ML²T¯²]

52. Approximate power of flash light in watts (2 cells)

1.2 moon m

1.5

1.55

1.56

53. Approximate power of colour T.V in watt is

130

100

120

54. Approximate power of a car moving at a speed of 90 kmh¯¹ in watts

1.4 x 10⁸

1 x 10⁵

1.2 x 10⁶

1.3 x 10⁷

55. The average power and instantaneous power become equal if work is done at:

Any rate

At variable rate

At uniform rate

At high rate

56. If it is assumed that a frictional force f is present, during the downward motion of an object of mass, which of the following relation is true.

None of these

mgh – f = ½ mV²

2mg – f = ½ mV²

mgh – f = ½ mV²

57. The original source of geothermal energy is

Fossil fuels

Moon

Biomass

Earth

58. A solar cell converts sun’s energy into:

Sound

Electric energy

Heat energy

Light

59. Geothermal energy with in the earth is generated by

Residual heat of the earth

Radio active decay

All

Compression of material

60. The value of the escape velocity on the surface of the earth is:

1100 m sec¯¹

11 m sec¯¹

11 x 10⁸ m sec¯¹

1100 m sec¯¹

61. A coolie carries a load of 500 N to a distance of 100 m. The work done by him is

50,000 Nm

1/5 N

5 N

62. The original source of tidal energy is

Tides

Moon

Sun

Waves

63. The work done by the body is maximum when it has angle

60°

30°

90°

0°

64. SI unit of work is

N – ms¯¹

N – MS¯²

N – m²

N – m

65. All the food you eat in one day has the energy equivalent to petrol of

1/6 liter

1/8 liter

1/5 liter

¼ liter

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Maan AliLast Updated: May 26, 2025

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11 Comments

faran says:

July 25, 2021 at 6:09 pm

centripetal force ailso donot work

Azhar saeed shaheen says:

August 7, 2017 at 5:18 pm

100%

Azhar saeed shaheen says:

August 7, 2017 at 4:45 pm

i am not agree with the answer of q no 10 and pls any one tell me the lojic of q no 14 it will so kind of u dear friend

waqar says:

June 10, 2017 at 8:56 pm

It’s a good site for Entry test preparation.

umair ahmed says:

March 18, 2017 at 1:46 am

i also

1. Azhar saeed shaheen says:
  
  August 7, 2017 at 4:47 pm
  
  i also
  
Umair Yaseen says:

March 15, 2017 at 3:02 pm

is that correct???????

1. umair ahmed says:
  
  March 18, 2017 at 1:47 am
  
  yes bro
  
2. Azhar saeed shaheen says:
  
  August 7, 2017 at 4:46 pm
  
  i think its not correct
  
Haseeb Butt says:

September 16, 2016 at 2:17 am

Kilowatt hour is unit of electrical energy and yup centripetal force does no work

Usman Laghari says:

July 31, 2016 at 9:10 pm

80% at first attempt

ECAT Physics Work and Energy Test Online

Physics Work and Energy MCQS Online Test

ECAT Physics Work and Energy Chapter Online Test

ECAT Physics Work and Energy Test Online

Physics

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Maan Ali

11 Comments

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Physics Work and Energy MCQS Online Test

ECAT Physics Work and Energy Chapter Online Test

ECAT Physics Work and Energy Test Online

Physics

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