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MDCAT Physics Work and Energy Online Test

Malik TahirLast Updated: May 26, 2025

Physics Work and Energy MCQS Online Test

MDCAT 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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MDCAT Physics Work and Energy Test Online

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Page 1 of 3

Physics

1. 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

500 J

60 J

600 J

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

Sound

Electric energy

Light

Heat energy

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

Decreases

Increases

Becomes zero

Remains the same

4. Which of the following is true?

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

Momentum is conserved in all collisions but not kinetic energy

Both momentum and kinetic energy are conserved in all collisions

5. 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?

19:1

2:1

16:1

4:1

6. 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 10⁴ J

3.5 x 10⁶ J

3.5 x 10³ J

3.5 x 10⁹ J

7. 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

8. 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

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

2.40

2.43

1.23

2.59

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

Data is not sufficient

Heavy object

Both have the same momentum

Light object

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

The actual path taken

The height of the table

The speed of the particle

The tie taken in this work

12. The unit of power is

Joule per second

Kilojoule

Joule

Watt per second

13. Reason of weightlessness in a satellite is

Zero reaction force by satellite surface

Zero gravity

Center of mass

None of these

14. 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

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

None of these

Terminal velocity

Escape velocity

Kinetic energy

16. The original source of tidal energy is

Tides

Moon

Waves

Sun

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

Maximum positive work

No work

Positive work but

Negative work

18. 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

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

39.2 J

3.92 J

38.2 J

392.1 J

20. The atmosphere is held to the earth by

Gravity

Winds

Clouds

The rotation of earth

21. The Escape velocity of Mars in Kms¯¹

5.00

5.23

3.99

2.89

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

1100 m sec¯¹

11 x 10⁸ m sec¯¹

11 m sec¯¹

1100 m sec¯¹

23. The dimension of power is

[ML²T¯²]

[M²LT¯³]

[ML²T³]

[MLT]

24. Which of the following is conservative field?

All of these

Frictional field

Electrostatic field

Viscous field

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

120

100

130

Page 2 of 3

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

Zero

Maximum

Minimum

27. 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?

F/d

-Fd

Zero

28. Power is a measure of the

Rate of change of momentum

Force which produces motion

Change of energy

Rate of change of energy

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

150 W

21 W

42 W

2500 W

30. The relation between horse power and watt is

1 hp = 946 watts

1 hp = 746 watts

1 hp = 546 watts

1 hp = 1000 watts

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

90°

30°

60°

0°

32. The Escape velocity of Saturn in Kms¯¹

35.04

37.4

37.0

30.0

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

A man jumping onto a moving cart

Striking of two glass balls

A bullet striking a bag of sand

An electron captured by a proton

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

A deuteron

An a particle

An electron

A proton

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

Infinity

Maximum

Minimum

Zero

36. 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

400 J

50 J

-400 J

37. 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

400 J

Zero

38. 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.

None

It remains constant throughout the motion.

It increases throughout the motion

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

Its path

Its distance

Its mass

Its potential energy

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

Potential energy

Gravitational energy

Kinetic energy

Electrical energy

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

1.2 moon m

1.55

1.5

1.56

42. SI unit of work is

N – m²

N – ms¯¹

N – m

N – MS¯²

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

0.5Fv²

0.5Fv

Fv²

44. 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

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

1 x 10¹² J

1 x 10¹⁰ J

1 x 10¹¹ J

1 x 10⁹ J

46. The Escape velocity of Earth in Kms¯¹

12.3

15.6

11.2

9.75

47. One Kilowatt hour is equal

3.6 x 10⁶ J

3.5 x 10⁵ J

306 x 10⁵ J

3.5 x 10⁶ J

48. 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

FGd

mgh

49. The original source of hydroelectric is

Wind

Moon

Water

Sun

50. 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

mgh – f = ½ mV²

Page 3 of 3

51. 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.

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

1/8 liter

1/6 liter

1/5 liter

¼ liter

53. 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 N

19.6 J

19.6 m

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

Equal

Less

Cannot be concluded

Greater

55. 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

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

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

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

Vector quantity

None of these

Constant quantity

Scalar quantity

57. The original source of geothermal energy is

Moon

Earth

Biomass

Fossil fuels

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

Work

Energy

Power

Acceleration

59. The original source of biomass energy is

Moon

Geothermal

Sun

None of these

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

Potential energy + kinetic energy

Potential energy

Sound energy

Kinetic energy

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

F/v

v/F

Fv²

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

None of these

Energy produced in nuclear plants

Power of petrol engine

Electrical Energy

63. Geothermal energy with in the earth is generated by

All

Compression of material

Residual heat of the earth

Radio active decay

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

None of these

Twice a day

Once a day

Several a day

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

At uniform rate

Any rate

At variable rate

At high rate

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Malik TahirLast Updated: May 26, 2025

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4 Comments

Hoorain says:

August 5, 2022 at 12:25 am

Why is it saying that electric force does no work whereas it is actually centripetal force which does no work on the body.

salman says:

August 24, 2021 at 10:49 am

why is it wrong?
magnitude of work =Fdcos tita

Asfand yar says:

June 9, 2017 at 8:32 am

Test =good
Mcqs 11 difficult
Ans with reason please with formula

1. sohali says:
  
  August 12, 2022 at 6:47 pm
  
  the answer of 11 is in Punjab text book

MDCAT Physics Work and Energy Online Test

Physics Work and Energy MCQS Online Test

MDCAT Physics Work and Energy Chapter Online Test

MDCAT Physics Work and Energy Test Online

Physics

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Malik Tahir

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