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

Decreases

Remains the same

Increases

Becomes zero

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

Vector quantity

None of these

Constant quantity

Scalar quantity

3. Geothermal energy with in the earth is generated by

Compression of material

Radio active decay

All

Residual heat of the earth

4. 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?

FGd

-FGd

mgh

Zero

5. Power is a measure of the

Rate of change of energy

Force which produces motion

Rate of change of momentum

Change of energy

6. 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

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

0.45 m/s

1 m/s

4.4 m/s

1.4 m/s

8. One Kilowatt hour is equal

3.5 x 10⁶ J

306 x 10⁵ J

3.5 x 10⁵ J

3.6 x 10⁶ J

9. 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 increases throughout the motion

It remains constant throughout the motion.

It decreases throughout the motion.

10. The relation between horse power and watt is

1 hp = 946 watts

1 hp = 546 watts

1 hp = 1000 watts

1 hp = 746 watts

11. The original source of biomass energy is

Moon

None of these

Geothermal

Sun

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

1 x 10¹¹ J

1 x 10⁹ J

1 x 10¹⁰ J

1 x 10¹² J

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

130

100

120

14. SI unit of work is

N – m²

N – m

N – ms¯¹

N – MS¯²

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

None of these

Power of petrol engine

Energy produced in nuclear plants

Electrical Energy

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

Its path

Its distance

Its potential energy

Its mass

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

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

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

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

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

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

Sound

Heat energy

Electric energy

Light

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

60°

30°

0°

90°

20. 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.

mgh – f = ½ mV²

2mg – f = ½ mV²

mgh – f = ½ mV²

None of these

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

1.55

1.5

1.2 moon m

1.56

22. 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 J

19.6 m

23. The Escape velocity of Saturn in Kms¯¹

30.0

37.0

35.04

37.4

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

Fv²

F/v

v/F

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

Potential energy

Kinetic energy

Electrical energy

Gravitational energy

Page 2 of 3

26. 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)

500 J

50 J

600 J

60 J

27. The unit of power is

Joule

Joule per second

Kilojoule

Watt per second

28. 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

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

Non-conservative field

Conservative fields

Varying intensity field

None of these

30. 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

+ 490 Joules

+ 980 Joules

- 490 Joules

31. 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?

F/d

Zero

-Fd

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

Striking of two glass balls

A man jumping onto a moving cart

An electron captured by a proton

A bullet striking a bag of sand

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

0.5Fv²

Fv²

0.5Fv

34. The original source of geothermal energy is

Earth

Fossil fuels

Biomass

Moon

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

5 N

1/5 N

50,000 Nm

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

1.2 x 10⁶

1.4 x 10⁸

1 x 10⁵

1.3 x 10⁷

37. The Escape velocity of Mars in Kms¯¹

2.89

5.23

5.00

3.99

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

150 W

42 W

2500 W

21 W

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

2.59

2.43

2.40

1.23

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

Once a day

None of these

Several a day

Twice a day

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

Any rate

At variable rate

At uniform rate

At high rate

42. The original source of hydroelectric is

Water

Sun

Moon

Wind

43. 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?

16:1

19:1

4:1

2:1

44. The Escape velocity of Earth in Kms¯¹

15.6

11.2

12.3

9.75

45. 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

400 J

50 J

Zero

46. The atmosphere is held to the earth by

The rotation of earth

Winds

Gravity

Clouds

47. The dimension of power is

[MLT]

[ML²T¯²]

[M²LT¯³]

[ML²T³]

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

38.2 J

39.2 J

3.92 J

392.1 J

49. The original source of tidal energy is

Waves

Sun

Tides

Moon

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

Escape velocity

None of these

Terminal velocity

Kinetic energy

Page 3 of 3

51. 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 10³ J

3.5 x 10⁴ J

3.5 x 10⁹ J

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

An electron

A deuteron

A proton

An a particle

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

Energy

Power

Work

Acceleration

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

No work

Maximum positive work

Negative work

Positive work but

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

Maximum

Minimum

Zero

56. 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

Cannot be concluded

Greater

Equal

Less

57. 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.

< P.E.

Cannot be known

= P.E.

58. 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

59. Which of the following is conservative field?

Electrostatic field

All of these

Frictional field

Viscous field

60. Which of the following is true?

Both momentum and kinetic energy are conserved in all collisions

Neither momentum nor kinetic energy is conserved in inelastic collisions

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

Momentum is conserved in all collisions but not kinetic energy

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

Zero

Infinity

Maximum

Minimum

62. 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

63. Reason of weightlessness in a satellite is

Zero reaction force by satellite surface

None of these

Zero gravity

Center of mass

64. 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?

Zero

50 J

400 J

-400 J

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

¼ liter

1/8 liter

1/5 liter

1/6 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

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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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