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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 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)

+ 490 Joules

+ 980 Joules

- 980 Joules

- 490 Joules

2. Which of the following is conservative field?

All of these

Electrostatic field

Frictional field

Viscous field

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

Scalar quantity

None of these

Constant quantity

Vector quantity

4. Power is a measure of the

Rate of change of energy

Change of energy

Rate of change of momentum

Force which produces motion

5. Which of the following is true?

Both momentum and kinetic energy are conserved in all collisions

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

Neither momentum nor kinetic energy is conserved in inelastic collisions

6. The original source of hydroelectric is

Moon

Water

Wind

Sun

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

2.59

2.43

2.40

1.23

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

90°

30°

60°

0°

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

1.4 x 10⁸

1.3 x 10⁷

1 x 10⁵

1.2 x 10⁶

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

Kinetic energy

Potential energy + kinetic energy

Sound energy

Potential energy

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

Escape velocity

None of these

Kinetic energy

Terminal velocity

12. 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

60 J

500 J

13. The dimension of power is

[ML²T³]

[MLT]

[ML²T¯²]

[M²LT¯³]

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

None of these

Varying intensity field

Conservative fields

Non-conservative field

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

Remains the same

Decreases

Becomes zero

Increases

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

Infinity

Zero

Maximum

Minimum

17. 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 m

19.6 J

19.6 N

18. Reason of weightlessness in a satellite is

Zero gravity

None of these

Zero reaction force by satellite surface

Center of mass

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

130

100

120

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

1/6 liter

¼ liter

1/5 liter

1/8 liter

21. 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.

2mg – f = ½ mV²

mgh – f = ½ mV²

None of these

mgh – f = ½ mV²

22. Geothermal energy with in the earth is generated by

Compression of material

All

Radio active decay

Residual heat of the earth

23. 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

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

At variable rate

At uniform rate

At high rate

Any rate

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

v/F

Fv²

F/v

Page 2 of 3

26. One Kilowatt hour is equal

3.5 x 10⁵ J

3.5 x 10⁶ J

3.6 x 10⁶ J

306 x 10⁵ J

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

4.4 m/s

1.4 m/s

0.45 m/s

1 m/s

28. The Escape velocity of Earth in Kms¯¹

11.2

12.3

15.6

9.75

29. The original source of tidal energy is

Tides

Waves

Moon

Sun

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

11 x 10⁸ m sec¯¹

1100 m sec¯¹

11 m sec¯¹

1100 m sec¯¹

31. The atmosphere is held to the earth by

Winds

The rotation of earth

Clouds

Gravity

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

None of these

Electrical Energy

Energy produced in nuclear plants

Power of petrol engine

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

Electric energy

Light

Heat energy

Sound

34. 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?

It remains constant throughout the motion.

It increases throughout the motion

None

It decreases throughout the motion.

35. 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

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

Zero

Minimum

Maximum

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

392.1 J

3.92 J

39.2 J

38.2 J

38. 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

Zero

F/d

39. The original source of biomass energy is

Moon

None of these

Geothermal

Sun

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

1.5

1.2 moon m

1.56

1.55

41. 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

4:1

19:1

2:1

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

Its distance

Its potential energy

Its path

Its mass

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

1 x 10¹² J

1 x 10⁹ J

1 x 10¹⁰ J

1 x 10¹¹ J

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

5 N

50,000 Nm

1/5 N

45. The relation between horse power and watt is

1 hp = 746 watts

1 hp = 1000 watts

1 hp = 946 watts

1 hp = 546 watts

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

Twice a day

Once a day

Several a day

None of these

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

The speed of the particle

The height of the table

The actual path taken

The tie taken in this work

48. The Escape velocity of Saturn in Kms¯¹

37.4

30.0

35.04

37.0

49. 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:

Cannot be known

< P.E.

= P.E.

> P.E.

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

Striking of two glass balls

An electron captured by a proton

A man jumping onto a moving cart

A bullet striking a bag of sand

Page 3 of 3

51. The original source of geothermal energy is

Earth

Moon

Biomass

Fossil fuels

52. SI unit of work is

N – ms¯¹

N – MS¯²

N – m

N – m²

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

Both have the same momentum

Data is not sufficient

Light object

Heavy object

54. 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 10³ J

3.5 x 10⁶ J

3.5 x 10⁹ J

3.5 x 10⁴ J

55. The unit of power is

Joule

Watt per second

Joule per second

Kilojoule

56. The Escape velocity of Mars in Kms¯¹

2.89

5.00

5.23

3.99

57. 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

Zero

50 J

-400 J

58. 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

Less

Equal

Cannot be concluded

Greater

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

Gravitational energy

Electrical energy

Potential energy

Kinetic energy

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

42 W

21 W

150 W

2500 W

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

Maximum positive work

Negative work

Positive work but

No work

62. 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

0.5Fv²

Fv²

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

Gain in P.E = Loss in K.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

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

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

An electron

A proton

A deuteron

An a particle

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

Energy

Power

Work

Acceleration

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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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