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

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:

Question # 2

Power is a :

Question # 3

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

Question # 4

The angle between centripetal force and displacement of the body moving in a circle is:

Question # 5

Work-energy principle states that work done on the body by applied force is equal to change in:

Question # 6

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

Question # 7

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

Question # 8

The tidal energy is produced due to rotation of Earth relative to:

Question # 9

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:

Question # 10

Work is product of:

Question # 11

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

Question # 12

SI Unit of work is

Question # 13

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 # 14

Work done in lower and bucket into the well is:

Question # 15

The work done moving a body between two points in a conservation field is independent of the:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
2 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
3 Escape velocity from surface of Moon as compared to that from Earth surface is:
A. Greater
B. Smaller
C. Equal
D. None of thes
4 1 J = ________?
A. 107erges
B. 10-7erges
C. 105erges
D. 10-5erges
5 Work done in lower and bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
6 When a body moves against the force of friction on a horizontal plane, the work done by the body is:
A. Positive
B. Negative
C. Zero
D. None of these
7 If force and displacement are in opposite direction, the work done is taken as
A. Positive work
B. Negative work
C. Zero work
D. Infinite work
8 SI Unit of work is
A. Nm-1
B. Joule
C. Nms
D. Both a and b
9 The work done by a force, keeping an object in circular motion with constant speed is:
A. Zero J
B. 1 J
C. 0.1 J
D. 0.01 J
10 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:
A. +5 x 101J
B. +5 x 102J
C. +5 x 103J
D. +5 x 104J

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