ECAT Pre Computer Science Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 4 Work and Energy

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ECAT Physics Chapter 4 Work and Energy

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Question # 1

The unit of work in CGS system is

Question # 2

Power is a :

Question # 3

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Question # 4

In the force applied is parallel to the direction of motion, then work done is:

Question # 5

If one newton force acts on a body and displaces the body through 1m work done on body is

Question # 6

When a falling body hits ground, its KE changes to _____ energy.

Question # 7

The work done by a force, keeping an object in circular motion with constant speed is:

Question # 8

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

Question # 9

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

Question # 10

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

Question # 11

The value of escape velocity of Earth planet comes out to be:

Question # 12

Which force is not a conservative force?

Question # 13

The types of mechanical energy is/are:

Question # 14

If force and displacement are in opposite direction, the work done is taken as:

Question # 15

Which of the following is not a unit of power:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
2 Work done is independent of path followed in _______
A. Gravitational field
B. Magnetic field
C. Electric field
D. All of these
3 The work performed on an object does not depend on
A. Force applied
B. Angle at which force is inclined to the displacement
C. Initial velocity of the object
D. Displacement
4 A 2 kg block is held 1 m above floor for 50 seconds. The work done is:
A. Zero
B. 10.2 J
C. 100 J
D. 980 J
5 Most of the geysers occur in:
A. Volcanic regions
B. Magnetic regions
C. Northern region
D. None of these
6 When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is
A. 0.5 J
B. 2 J
C. 0.25 J
D. 1 J
7 Work is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
8 When velocity of moving body is doubled, the quantity which is also doubled is its:
A. K.E.
B. Acceleration
C. Momentum
D. P.E.
9 The dimensions of work
A. [MLT-1]
B. [MLT-2]
C. [ML2T-2]
D. [MLT]
10 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these

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