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

Decreases

Increases

Remains the same

Becomes zero

2. 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

Heavy object

Light object

3. 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

Zero

50 J

-400 J

4. 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

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

None of these

Non-conservative field

Conservative fields

Varying intensity field

6. Reason of weightlessness in a satellite is

None of these

Zero gravity

Center of mass

Zero reaction force by satellite surface

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

30°

60°

0°

90°

8. The original source of hydroelectric is

Wind

Water

Moon

Sun

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

Acceleration

Work

Power

Energy

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

Minimum

Zero

Maximum

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

Constant quantity

Scalar quantity

None of these

Vector quantity

12. 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

13. The unit of power is

Joule

Joule per second

Kilojoule

Watt per second

14. Geothermal energy with in the earth is generated by

Compression of material

All

Radio active decay

Residual heat of the earth

15. 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

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

130

120

100

17. The dimension of power is

[MLT]

[M²LT¯³]

[ML²T¯²]

[ML²T³]

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

1.2 x 10⁶

1.3 x 10⁷

1.4 x 10⁸

1 x 10⁵

19. 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

20. Which of the following is true?

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

Both momentum and kinetic energy are conserved in all collisions

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

Sound energy

Kinetic energy

Potential energy

Potential energy + kinetic energy

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

Any rate

At uniform rate

At high rate

At variable rate

23. 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

mgh – f = ½ mV²

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

1 x 10⁹ J

1 x 10¹⁰ J

1 x 10¹¹ J

1 x 10¹² J

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

1/6 liter

¼ liter

1/5 liter

1/8 liter

Page 2 of 3

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

Power of petrol engine

Electrical Energy

Energy produced in nuclear plants

None of these

27. The original source of biomass energy is

Sun

Moon

None of these

Geothermal

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

Kinetic energy

Escape velocity

Terminal velocity

None of these

29. The original source of tidal energy is

Waves

Sun

Moon

Tides

30. The relation between horse power and watt is

1 hp = 946 watts

1 hp = 1000 watts

1 hp = 746 watts

1 hp = 546 watts

31. The Escape velocity of Mars in Kms¯¹

5.23

3.99

5.00

2.89

32. 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

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

11 m sec¯¹

1100 m sec¯¹

11 x 10⁸ m sec¯¹

34. 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

16:1

2:1

4:1

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

Kinetic energy

Gravitational energy

Electrical energy

Potential energy

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

The actual path taken

The tie taken in this work

The height of the table

The speed of the particle

37. One Kilowatt hour is equal

306 x 10⁵ J

3.5 x 10⁶ J

3.6 x 10⁶ J

3.5 x 10⁵ J

38. Which of the following is conservative field?

Viscous field

Electrostatic field

Frictional field

All of these

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

Positive work but

Negative work

Maximum positive work

No work

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

2500 W

21 W

42 W

150 W

41. 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

50 J

500 J

60 J

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

1.2 moon m

1.5

1.55

1.56

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

19.6 N

19.6 J

19.6 kg

19.6 m

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

F/v

v/F

Fv²

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

Zero

Infinity

Maximum

Minimum

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

Several a day

Twice a day

None of these

Once a day

47. SI unit of work is

N – MS¯²

N – ms¯¹

N – m

N – m²

48. The Escape velocity of Earth in Kms¯¹

9.75

15.6

11.2

12.3

49. 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:

Cannot be known

> P.E.

< P.E.

= P.E.

50. The Escape velocity of Saturn in Kms¯¹

35.04

30.0

37.0

37.4

Page 3 of 3

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

An electron captured by a proton

A bullet striking a bag of sand

A man jumping onto a moving cart

Striking of two glass balls

52. 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

53. 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 10⁹ J

3.5 x 10³ J

3.5 x 10⁶ J

54. The original source of geothermal energy is

Fossil fuels

Moon

Earth

Biomass

55. Power is a measure of the

Change of energy

Force which produces motion

Rate of change of momentum

Rate of change of energy

56. The atmosphere is held to the earth by

Clouds

Winds

The rotation of earth

Gravity

57. 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

Zero

-Fd

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

A deuteron

A proton

An a particle

An electron

59. 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

Zero

FGd

-FGd

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

39.2 J

392.1 J

3.92 J

38.2 J

61. 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

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

Light

Heat energy

Sound

Electric energy

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

Its path

Its mass

Its potential energy

Its distance

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

2.40

2.59

2.43

1.23

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

1.4 m/s

1 m/s

0.45 m/s

4.4 m/s

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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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