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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.
Test Helpful For:	MDCAT Entry Test Physics Online Test Interview Questions about Physics All Universities Entrance Test Recruitments Tests

MDCAT Physics Work and Energy Test Online

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Page 1 of 3

Physics

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

Electrical energy

Kinetic energy

Gravitational energy

Potential energy

2. The original source of biomass energy is

Moon

Sun

Geothermal

None of these

3. 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

4. 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 10³ J

3.5 x 10⁹ J

3.5 x 10⁴ J

5. 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

6. Reason of weightlessness in a satellite is

None of these

Zero reaction force by satellite surface

Center of mass

Zero gravity

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

At uniform rate

Any rate

At high rate

At variable rate

8. 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

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

1.55

1.5

1.56

1.2 moon m

10. 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

11. 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

500 J

60 J

50 J

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

Kinetic energy

Sound energy

Potential energy

Potential energy + kinetic energy

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

None of these

Electrical Energy

Energy produced in nuclear plants

Power of petrol engine

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

38.2 J

392.1 J

3.92 J

39.2 J

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

1.2 x 10⁶

1.4 x 10⁸

1 x 10⁵

1.3 x 10⁷

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

Heat energy

Light

Sound

Electric energy

17. The Escape velocity of Earth in Kms¯¹

15.6

9.75

12.3

11.2

18. Which of the following is conservative field?

Frictional field

Electrostatic field

All of these

Viscous field

19. The original source of geothermal energy is

Moon

Fossil fuels

Biomass

Earth

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

Acceleration

Power

Energy

Work

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

Positive work but

Negative work

Maximum positive 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

Infinity

Maximum

Zero

23. 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

24. The dimension of power is

[ML²T³]

[ML²T¯²]

[MLT]

[M²LT¯³]

25. 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

Page 2 of 3

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

1.4 m/s

0.45 m/s

1 m/s

4.4 m/s

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

150 W

42 W

21 W

2500 W

28. Power is a measure of the

Change of energy

Force which produces motion

Rate of change of momentum

Rate of change of energy

29. The Escape velocity of Saturn in Kms¯¹

37.4

35.04

37.0

30.0

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

F/v

Fv²

v/F

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

1/8 liter

1/5 liter

¼ liter

1/6 liter

32. 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 J

19.6 m

19.6 N

33. The original source of tidal energy is

Sun

Tides

Moon

Waves

34. SI unit of work is

N – ms¯¹

N – m

N – m²

N – MS¯²

35. One Kilowatt hour is equal

306 x 10⁵ J

3.5 x 10⁵ J

3.6 x 10⁶ J

3.5 x 10⁶ J

36. 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

+ 980 Joules

- 490 Joules

+ 490 Joules

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

Scalar quantity

Constant quantity

None of these

Vector quantity

38. The atmosphere is held to the earth by

Clouds

Winds

The rotation of earth

Gravity

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

Maximum

Minimum

Zero

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

None of these

Once a day

Twice a day

Several a day

41. 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

42. 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

F/d

-Fd

43. The unit of power is

Watt per second

Joule per second

Joule

Kilojoule

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

2.40

1.23

2.59

2.43

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

100

130

120

46. The relation between horse power and watt is

1 hp = 1000 watts

1 hp = 746 watts

1 hp = 546 watts

1 hp = 946 watts

47. 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

Zero

-400 J

50 J

48. 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

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

1 x 10⁹ J

1 x 10¹¹ J

1 x 10¹² J

1 x 10¹⁰ J

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

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

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

Page 3 of 3

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

5 N

1/5 N

50,000 Nm

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

Its path

Its potential energy

Its mass

Its distance

53. Which of the following is true?

Neither momentum nor kinetic energy is conserved in inelastic collisions

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

Momentum is conserved in all collisions but not kinetic energy

54. 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

19:1

16:1

4:1

55. The Escape velocity of Mars in Kms¯¹

5.23

2.89

3.99

5.00

56. 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

Equal

Less

57. 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

58. The original source of hydroelectric is

Water

Wind

Sun

Moon

59. 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

50 J

-400 J

400 J

60. 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

Light object

Heavy object

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

Escape velocity

Terminal velocity

None of these

Kinetic energy

62. 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

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

30°

60°

0°

90°

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

A proton

An a particle

A deuteron

An electron

65. Geothermal energy with in the earth is generated by

Residual heat of the earth

Compression of material

Radio active decay

All

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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

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