# MCQ Questions for Class 11 Physics Chapter 6 Work, Energy and Power with Answers

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 6 Work, Energy and Power with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Work, Energy and Power Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

Q1. A man of 60 kg weight is standing at rest on a platform. He jumps up vertically a distance of 1 m and the platform at the same instant moves horizontally forward with the result that the man lands 1 meter behind the point on the platfrom from where the took the jump the total work done by the man at the instant he lands is

(a) 300 J
(b) 150 J
(c) 600 J
(d) zero

(c) 600 J

Q2. A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?

(a) 7.2 J
(b) 3.6 J
(c) 120 J
(d) 1200 J

(b) 3.6 J

(a) 100 J
(b) 392 J
(c) 60 J
(d) -100 J

(b) 392 J

(a) 25 J
(b) 125 J
(c) 1250 J
(d) 1000 J

(b) 125 J

(a) 0.6 m
(b) 0.4 m
(c) 1 m
(d) 0.36 m

(d) 0.36 m

(a) 998 W
(b) 1002 W
(c) 2000 W
(d) 500 W

(d) 500 W

(a) 300
(b) 150
(c) 100
(d) 50

(d) 50

(a) 5g J
(b) 10g J
(c) Zero
(d) g J

(c) Zero

(a) 316 J
(b) 216 J
(c) 116 J
(d) 392 J

(b) 216 J

(a) 4 : 1
(b) 1 : 2
(c) 0 : 1
(d) 1 : 6

(b) 1 : 2

(a) 490 J
(b) 50 J
(c) 100 J
(d) 300 J

(a) 490 J

(a) 300 J
(b) 150 J
(c) 600 J
(d) zero

(c) 600 J

## Q13. According to work-energy theorem, the work done by the net force on a particle is equal to the change in its

a) kinetic energy
b) angular momentum
c) linear momentum
d) potential energy

a) kinetic energy

## Q14. A light and a heavy body have equal momentum. Which one has greater K.E.?

a) The lighter body
b) The heavier body
c) Both have equal K.E.
d) Data given is incomplete

a) The lighter body

a) positive
b) zero
c) negative
d) None of these

a) positive

## Q16. Work done by a conservative force is positive if

a) P.E. of the body decreases
b) K.E. of the body increases
c) K.E. of the body decreases
d) P.E. of the body increases

a) P.E. of the body decreases

## Q17. The …X… energy V(x) of the spring is said to be zero when block and spring system is in the …Y… position. Here, X and Y refer to

a) potential, equilibrium
b) kinetic, equilibrium
c) mechanical, equilibrium
d) vibrational, left

a) potential, equilibrium

## Q18. Which of the following must be known in order to determine the power output of an automobile?

a) Work performed and elapsed time of work
b) Force exerted and distance of motion
c) Mass and amount of work performed
d) Final velocity and height

a) Work performed and elapsed time of work

a) increasing
b) zero
c) uniform
d) decreasing

a) increasing

## Q20. A body projected vertically from the earth reaches a height equal to earth’s radius before returning to the earth. The power exerted by the gravitational force is greatest

a) at the instant just before the body hits the earth
b) at the highest position of the body
c) it remains constant all through
d) at the instant just after the body is projected

a) at the instant just before the body hits the earth

a) 1200
b) 100
c) 2000
d) 1000

a) 1200

## Q22. The engine of a vehicle delivers constant power. If the vehicle is moving up the inclined plane then, its velocity

a) must remain constant
b) must increase
c) must decrease
d) may increase, decrease or remain same

a) must remain constant

We hope the given NCERT MCQ Questions for Class 11 Physics Chapter 6 Work, Energy and Power with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 11 Physics Work, Energy and Power MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

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