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

Maximum

Minimum

Zero

Infinity

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

Light

Electric energy

Sound

Heat energy

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

19.6 m

19.6 J

19.6 N

19.6 kg

4. Which of the following is true?

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

Momentum is conserved in all collisions but not kinetic energy

Neither momentum nor kinetic energy is conserved in inelastic collisions

5. 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.

None

It increases throughout the motion

It decreases throughout the motion.

6. The original source of hydroelectric is

Water

Wind

Sun

Moon

7. The atmosphere is held to the earth by

The rotation of earth

Gravity

Winds

Clouds

8. The Escape velocity of Saturn in Kms¯¹

35.04

37.0

37.4

30.0

9. 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

- 490 Joules

+ 980 Joules

10. 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

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

Power of petrol engine

Electrical Energy

Energy produced in nuclear plants

None of these

12. The relation between horse power and watt is

1 hp = 746 watts

1 hp = 946 watts

1 hp = 546 watts

1 hp = 1000 watts

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

1 x 10¹⁰ J

1 x 10¹² J

1 x 10⁹ J

1 x 10¹¹ J

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

2.59

2.43

1.23

2.40

15. The Escape velocity of Mars in Kms¯¹

2.89

5.23

5.00

3.99

16. 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?

2:1

4:1

19:1

16:1

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

At high rate

At uniform rate

Any rate

At variable rate

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

Conservative fields

Non-conservative field

Varying intensity field

None of these

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

Both have the same momentum

Light object

Heavy object

Data is not sufficient

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

Gain in K.E = Loss 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

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

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

Minimum

Maximum

Zero

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

1 x 10⁵

1.2 x 10⁶

1.3 x 10⁷

1.4 x 10⁸

23. Geothermal energy with in the earth is generated by

Radio active decay

Compression of material

All

Residual heat of the earth

24. 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

Zero

50 J

25. The unit of power is

Joule

Watt per second

Kilojoule

Joule per second

Page 2 of 3

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

Acceleration

Power

Work

Energy

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

Electrical energy

Kinetic energy

Gravitational energy

Potential energy

28. 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

29. 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

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

90°

60°

30°

0°

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

Positive work but

Maximum positive work

Negative work

No work

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

1.5

1.55

1.2 moon m

1.56

33. 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

Equal

Greater

Less

34. 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

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

120

130

100

36. Reason of weightlessness in a satellite is

Zero gravity

Center of mass

None of these

Zero reaction force by satellite surface

37. 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

None of these

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

Constant quantity

None of these

Scalar quantity

Vector quantity

39. Which of the following is conservative field?

Frictional field

Viscous field

All of these

Electrostatic field

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

An electron

An a particle

A deuteron

A proton

41. One Kilowatt hour is equal

306 x 10⁵ J

3.5 x 10⁶ J

3.6 x 10⁶ J

3.5 x 10⁵ J

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

1/5 liter

1/6 liter

¼ liter

1/8 liter

43. The original source of biomass energy is

None of these

Geothermal

Sun

Moon

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

Several a day

Twice a day

None of these

Once a day

45. 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

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

21 W

2500 W

150 W

42 W

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

11 x 10⁸ m sec¯¹

11 m sec¯¹

1100 m sec¯¹

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

v/F

Fv²

F/v

49. The original source of tidal energy is

Tides

Moon

Sun

Waves

50. 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

Page 3 of 3

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

Terminal velocity

None of these

Kinetic energy

Escape velocity

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

Fv²

0.5Fv²

0.5Fv

53. 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

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

Increases

Decreases

Remains the same

Becomes zero

55. The dimension of power is

[M²LT¯³]

[ML²T¯²]

[ML²T³]

[MLT]

56. SI unit of work is

N – m

N – ms¯¹

N – MS¯²

N – m²

57. The Escape velocity of Earth in Kms¯¹

9.75

12.3

15.6

11.2

58. 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

59. 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

600 J

50 J

500 J

60. 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

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

Potential energy

Kinetic energy

Potential energy + kinetic energy

Sound energy

62. 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 tie taken in this work

The actual path taken

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

Its mass

Its distance

Its potential energy

Its path

64. The original source of geothermal energy is

Biomass

Earth

Fossil fuels

Moon

65. Power is a measure of the

Rate of change of energy

Change of energy

Force which produces motion

Rate of change of momentum

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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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