Work-Energy Theorem NEET Questions

Physics - Work, Energy, and Power

Work-Energy Theorem MCQ Questions


1.
A body of mass 1 kg is moving with a velocity of 10 m/s. A constant force acts on it for 4 seconds, increasing its velocity to 20 m/s. The work done by the force over this period is:

NEET - 2015

A.
100 J
B.
150 J
C.
200 J
D.
250 J
😑 View Answer Rough Work Error
ANSWER :
C. 200 J
2.
The work-energy theorem states that the work done by the net force on an object is equal to the change in its:
A.
Momentum
B.
Potential energy
C.
Kinetic energy
D.
Acceleration
😑 View Answer Rough Work Error
ANSWER :
C. Kinetic energy
3.
If the net work done on an object is positive, what happens to its kinetic energy?
A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes zero
😑 View Answer Rough Work Error
ANSWER :
A. Increases
4.
The work-energy theorem is derived from which of Newton’s laws?
A.
First law
B.
Second law
C.
Third law
D.
None of these
😑 View Answer Rough Work Error
ANSWER :
B. Second law
5.
If a force F is applied perpendicular to the displacement, the work done is:
A.
Zero
B.
Maximum
C.
Negative
D.
Infinite
😑 View Answer Rough Work Error
ANSWER :
A. Zero
6.
A body of mass 5 kg is moving with a velocity of 10 m/s. How much work is required to stop the body?
A.
250 J
B.
-250 J
C.
500 J
D.
-500 J
😑 View Answer Rough Work Error
ANSWER :
B. -250 J