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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 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

-400 J

50 J

Zero

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

1 x 10¹¹ J

1 x 10¹² J

1 x 10⁹ J

1 x 10¹⁰ J

3. The original source of geothermal energy is

Moon

Fossil fuels

Earth

Biomass

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

42 W

21 W

2500 W

150 W

5. 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

6. The original source of tidal energy is

Moon

Sun

Tides

Waves

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

Heat energy

Electric energy

Light

Sound

8. Which of the following is true?

Momentum is conserved in all collisions but not kinetic energy

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

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

v/F

Fv²

F/v

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

None of these

Scalar quantity

Constant quantity

Vector quantity

11. 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

Loss in K.E = Gain in P.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

12. Power is a measure of the

Rate of change of momentum

Rate of change of energy

Change of energy

Force which produces motion

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

1.4 x 10⁸

1.3 x 10⁷

1.2 x 10⁶

1 x 10⁵

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

Escape velocity

Kinetic energy

Terminal velocity

None of these

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

Gravitational energy

Electrical energy

Kinetic energy

Potential energy

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

1/8 liter

¼ liter

1/6 liter

1/5 liter

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

50,000 Nm

5 N

1/5 N

18. Reason of weightlessness in a satellite is

Center of mass

Zero gravity

Zero reaction force by satellite surface

None of these

19. 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

20. 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

Less

Equal

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

Positive work but

Maximum positive work

Negative work

No work

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

Minimum

Zero

Maximum

Infinity

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

1.2 moon m

1.56

1.5

1.55

24. 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

25. The unit of power is

Joule per second

Watt per second

Joule

Kilojoule

Page 2 of 3

26. 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

It remains constant throughout the motion.

None

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

An electron

A proton

An a particle

A deuteron

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

Energy

Acceleration

Work

Power

29. The Escape velocity of Earth in Kms¯¹

9.75

15.6

11.2

12.3

30. 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)

600 J

60 J

500 J

50 J

31. 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.

32. The atmosphere is held to the earth by

Clouds

Winds

Gravity

The rotation of earth

33. The original source of hydroelectric is

Water

Moon

Sun

Wind

34. SI unit of work is

N – ms¯¹

N – MS¯²

N – m

N – m²

35. 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

36. The relation between horse power and watt is

1 hp = 1000 watts

1 hp = 746 watts

1 hp = 546 watts

1 hp = 946 watts

37. The dimension of power is

[ML²T³]

[ML²T¯²]

[M²LT¯³]

[MLT]

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

Sound energy

Potential energy + kinetic energy

Kinetic energy

Potential energy

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

130

100

120

40. The original source of biomass energy is

Moon

None of these

Geothermal

Sun

41. Geothermal energy with in the earth is generated by

Residual heat of the earth

All

Radio active decay

Compression of material

42. 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 10⁴ J

3.5 x 10⁹ J

43. 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

44. 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?

Zero

50 J

400 J

-400 J

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

Decreases

Becomes zero

Increases

Remains the same

46. 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

47. The Escape velocity of Saturn in Kms¯¹

30.0

37.4

37.0

35.04

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

Zero

Minimum

Maximum

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

Any rate

At high rate

At uniform rate

At variable rate

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

The height of the table

The actual path taken

The tie taken in this work

The speed of the particle

Page 3 of 3

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

Non-conservative field

Varying intensity field

None of these

Conservative fields

52. 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

Zero

mgh

FGd

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

Its path

Its distance

Its mass

Its potential energy

54. 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

55. 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?

4:1

2:1

19:1

16:1

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

None of these

Electrical Energy

Power of petrol engine

Energy produced in nuclear plants

57. 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 kg

19.6 N

19.6 m

58. 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

392.1 J

3.92 J

59. Which of the following is conservative field?

Electrostatic field

Frictional field

All of these

Viscous field

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

Once a day

Several a day

Twice a day

None of these

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

30°

60°

0°

90°

62. The Escape velocity of Mars in Kms¯¹

3.99

2.89

5.00

5.23

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

2.59

2.43

1.23

2.40

64. One Kilowatt hour is equal

3.5 x 10⁶ J

3.6 x 10⁶ J

306 x 10⁵ J

3.5 x 10⁵ J

65. 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

+ 490 Joules

- 980 Joules

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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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