Exercise: Engineering Mechanics

Questions for: Engineering Mechanics

When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.
A:
Correct
B:
Incorrect
C:
D:
Answer: B
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Whenever a force acts on a body and the body undergoes a displacement, then
A:
work is said to be done
B:
power is being transmitted
C:
body has kinetic energy of translation
D:
none of these
Answer: A
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Onejoule is equal to
A:
0.1 N-m
B:
1 N-m
C:
10 N-m
D:
100 N-m
Answer: B
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The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
A:
P = Q
B:
Q = R
C:
Q = 2R
D:
none of these
Answer: B
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For a self locking machine, the efficiency must be
A:
equal to 50%
B:
less than 50%
C:
greater than 50%
D:
100%
Answer: B
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