ECAT Pre Computer Science Chapter 4 MCQ Test With Answer

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

Try The 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 among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

Question # 2

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

Question # 3

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

Question # 4

The dimensions of work

Question # 5

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

Question # 6

Work has a dimension as that of:

Question # 7

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 # 8

Area under the force displacement graph gives

Question # 9

The consumption of energy by a 60 W bulb in 2 minutes is:

Question # 10

Work done by the force of friction is always

Question # 11

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

Question # 12

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

Question # 13

Escape velocity from surface of Moon as compared to that from Earth surface is:

Question # 14

Work is a scalar product of

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
2 A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:
A. 0°
B. 30°
C. 60°
D. 90°
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:
A. Power
B. Work
C. Pressure
D. None of these
4 SI Unit of work is
A. Nm-1
B. Joule
C. Nms
D. Both a and b
5 A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:
A. +5 X 101J
B. +5 X 102J
C. +5 X 103J
D. +5 X 104J
6 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinte work
7 Which of the following type of force can do no work on the particle on which it acts:
A. Frictional force
B. Gravitational force
C. Electric force
D. Centripetal force
8 A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these
9 The space around the earth in which its gravitational force acts on a body is called
A. Electric Field
B. Gravitational field
C. Magnetic field
D. Conservative field
10 The value of escape velocity of Earth planet comes out to be:
A. 11 m/sec
B. 11 km/sec
C. 11 km/hour
D. 11 cm/sec

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