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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. 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.

> P.E.

Cannot be known

2. The original source of geothermal energy is

Moon

Fossil fuels

Biomass

Earth

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

60°

30°

0°

90°

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

Potential energy + kinetic energy

Kinetic energy

Sound energy

Potential energy

5. 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?

Zero

F/d

-Fd

6. The dimension of power is

[MLT]

[ML²T¯²]

[ML²T³]

[M²LT¯³]

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

v/F

Fv²

F/v

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

1/5 liter

1/8 liter

1/6 liter

¼ liter

9. SI unit of work is

N – MS¯²

N – ms¯¹

N – m

N – m²

10. The original source of biomass energy is

Geothermal

Sun

Moon

None of these

11. 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

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

Becomes zero

Decreases

Remains the same

Increases

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

120

130

100

14. Reason of weightlessness in a satellite is

Zero gravity

Center of mass

Zero reaction force by satellite surface

None of these

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

At uniform rate

At variable rate

Any rate

At high rate

16. 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

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

Positive work but

Negative work

Maximum positive work

No work

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

Its potential energy

Its mass

Its distance

Its path

19. 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

50 J

-400 J

Zero

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?

Zero

mgh

-FGd

FGd

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

1 x 10¹² J

1 x 10¹¹ J

1 x 10⁹ J

1 x 10¹⁰ J

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

3.92 J

392.1 J

39.2 J

38.2 J

23. 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)

60 J

50 J

600 J

500 J

24. Which of the following is conservative field?

Frictional field

Electrostatic field

All of these

Viscous field

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

Maximum

Zero

Minimum

Page 2 of 3

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

Power

Acceleration

Energy

Work

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

2.43

2.59

1.23

2.40

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

None of these

Several a day

Twice a day

Once a day

29. 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 10⁴ J

3.5 x 10³ J

3.5 x 10⁹ J

30. 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 decreases throughout the motion.

It increases throughout the motion

None

It remains constant throughout the motion.

31. 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

2:1

4:1

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

0.45 m/s

4.4 m/s

1.4 m/s

1 m/s

33. The Escape velocity of Mars in Kms¯¹

3.99

2.89

5.00

5.23

34. 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

- 490 Joules

- 980 Joules

+ 980 Joules

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. Kilowatt-hour commercially used to measure the consumption of

Power of petrol engine

Electrical Energy

None of these

Energy produced in nuclear plants

37. Power is a measure of the

Rate of change of momentum

Force which produces motion

Rate of change of energy

Change of energy

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

Constant quantity

None of these

Vector quantity

Scalar quantity

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

Heat energy

Light

Sound

Electric energy

40. The Escape velocity of Earth in Kms¯¹

12.3

15.6

9.75

11.2

41. The original source of tidal energy is

Sun

Moon

Tides

Waves

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

1.4 x 10⁸

1.2 x 10⁶

1 x 10⁵

1.3 x 10⁷

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

Escape velocity

None of these

Kinetic energy

Terminal velocity

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

1.55

1.2 moon m

1.56

1.5

45. The original source of hydroelectric is

Wind

Moon

Water

Sun

46. The Escape velocity of Saturn in Kms¯¹

30.0

37.0

37.4

35.04

47. Which of the following is true?

Both momentum and kinetic energy are conserved in all collisions

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

Momentum is conserved in all collisions but not kinetic energy

48. The unit of power is

Joule per second

Watt per second

Kilojoule

Joule

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

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

50. 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

Page 3 of 3

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

Kinetic energy

Gravitational energy

Electrical energy

Potential energy

52. The atmosphere is held to the earth by

Winds

Clouds

The rotation of earth

Gravity

53. Geothermal energy with in the earth is generated by

Compression of material

Radio active decay

All

Residual heat of the earth

54. 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

Greater

Cannot be concluded

Equal

Less

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

An electron captured by a proton

Striking of two glass balls

A man jumping onto a moving cart

A bullet striking a bag of sand

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

The speed of the particle

The tie taken in this work

The actual path taken

The height of the table

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

1100 m sec¯¹

11 x 10⁸ m sec¯¹

1100 m sec¯¹

11 m sec¯¹

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

A proton

An electron

An a particle

A deuteron

59. The relation between horse power and watt is

1 hp = 746 watts

1 hp = 546 watts

1 hp = 946 watts

1 hp = 1000 watts

60. 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

61. 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

None of these

mgh – f = ½ mV²

2mg – f = ½ mV²

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

Maximum

Minimum

Zero

Infinity

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

2500 W

42 W

21 W

150 W

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

19.6 J

19.6 N

19.6 m

19.6 kg

65. 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

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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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