Mechanics CDS Questions

CDS Physics

Mechanics MCQ Questions


7.
A ball moves in a frictionless inclined table without slipping. The work done by the table surface on the ball is
A.
Positive
B.
Negative
C.
Zero
D.
Infinity
😑 View Answer Rough Work Error
ANSWER :
C. Zero
8.
When can one say that work is done on the body
A.
When the body is stationary
B.
When there is an increase in energy because of mechanical influence
C.
When the body moves a certain distance
D.
When the body experiences force
😑 View Answer Rough Work Error
ANSWER :
B. When there is an increase in energy because of mechanical influence
9.
The rate of doing work is called
A.
Force
B.
Power
C.
Acceleration
D.
Displacement
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ANSWER :
B. Power
10.
What is the power utilised when work of 1000 J is done in 2 seconds?
A.
100 W
B.
200 W
C.
500 W
D.
1000 W
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ANSWER :
C. 500 W
11.
who proposed the mass energy relation ?
A.
JJ Thomson
B.
Albert Einstein
C.
Ernest Rutherford
D.
James chadwick
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ANSWER :
B. Albert Einstein
12.
A bullet fired from the rifle has_____
A.
Mechanical energy
B.
Kinetic energy
C.
Potential energy
D.
Chemical energy
😑 View Answer Rough Work Error
ANSWER :
B. Kinetic energy