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

21 W

42 W

150 W

2500 W

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

Gravitational energy

Potential energy

Electrical energy

Kinetic energy

3. 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

4. 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

5. The atmosphere is held to the earth by

Winds

Clouds

The rotation of earth

Gravity

6. 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 remains constant throughout the motion.

None

It increases throughout the motion

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

Scalar quantity

Constant quantity

None of these

Vector quantity

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

130

120

100

9. The original source of tidal energy is

Moon

Sun

Tides

Waves

10. 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

11. The original source of geothermal energy is

Biomass

Earth

Fossil fuels

Moon

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

Several a day

Once a day

None of these

Twice a day

13. 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

400 J

50 J

-400 J

14. 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

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

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

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

15. Geothermal energy with in the earth is generated by

Compression of material

All

Residual heat of the earth

Radio active decay

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

Energy

Power

Work

Acceleration

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

11 m sec¯¹

11 x 10⁸ m sec¯¹

1100 m sec¯¹

18. The Escape velocity of Earth in Kms¯¹

9.75

12.3

11.2

15.6

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

Non-conservative field

None of these

Conservative fields

Varying intensity field

20. 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 kg

19.6 N

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

Kinetic energy

Escape velocity

None of these

Terminal velocity

22. 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

600 J

50 J

60 J

23. 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 10⁹ J

3.5 x 10³ J

3.5 x 10⁶ J

3.5 x 10⁴ J

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

Its potential energy

Its mass

Its distance

Its path

25. 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

Page 2 of 3

26. 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

27. Reason of weightlessness in a satellite is

Center of mass

Zero reaction force by satellite surface

Zero gravity

None of these

28. 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

29. 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

30. The Escape velocity of Saturn in Kms¯¹

37.0

35.04

30.0

37.4

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

An electron

An a particle

A proton

A deuteron

32. The original source of hydroelectric is

Moon

Wind

Water

Sun

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

No work

Negative work

Positive work but

Maximum positive work

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

0°

60°

90°

30°

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

Both have the same momentum

Heavy object

Data is not sufficient

Light object

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

Becomes zero

Increases

Decreases

Remains the same

37. 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

38. 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.

Cannot be known

= P.E.

< P.E.

39. 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

-Fd

F/d

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

2.59

1.23

2.40

2.43

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

1/5 liter

1/6 liter

1/8 liter

¼ liter

42. Power is a measure of the

Force which produces motion

Rate of change of momentum

Rate of change of energy

Change of energy

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

A bullet striking a bag of sand

A man jumping onto a moving cart

Striking of two glass balls

An electron captured by a proton

44. 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

2:1

19:1

4:1

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?

50 J

Zero

400 J

-400 J

46. The dimension of power is

[MLT]

[ML²T¯²]

[ML²T³]

[M²LT¯³]

47. SI unit of work is

N – m²

N – MS¯²

N – m

N – ms¯¹

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

At high rate

At variable rate

At uniform rate

Any rate

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

1.2 x 10⁶

1.3 x 10⁷

1 x 10⁵

1.4 x 10⁸

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

1 m/s

4.4 m/s

1.4 m/s

0.45 m/s

Page 3 of 3

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

Potential energy

Potential energy + kinetic energy

Sound energy

Kinetic energy

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

FGd

mgh

Zero

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

Maximum

Minimum

Zero

54. The original source of biomass energy is

None of these

Geothermal

Moon

Sun

55. Which of the following is conservative field?

All of these

Viscous field

Electrostatic field

Frictional field

56. One Kilowatt hour is equal

3.5 x 10⁵ J

306 x 10⁵ J

3.5 x 10⁶ J

3.6 x 10⁶ J

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

Zero

Infinity

Minimum

Maximum

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

Heat energy

Sound

Light

Electric energy

59. The Escape velocity of Mars in Kms¯¹

5.00

2.89

5.23

3.99

60. 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

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

1.5

1.2 moon m

1.55

1.56

62. The unit of power is

Kilojoule

Joule

Joule per second

Watt per second

63. The relation between horse power and watt is

1 hp = 746 watts

1 hp = 946 watts

1 hp = 1000 watts

1 hp = 546 watts

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

Energy produced in nuclear plants

Power of petrol engine

Electrical Energy

None of these

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

v/F

Fv²

F/v

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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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