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Mechanical Engineering - Engineering Mechanics

Exercise : Engineering Mechanics - Section 3
41.
For a self locking machine, the efficiency must be
equal to 50%
less than 50%
greater than 50%
100%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
The resultant of the two forces P and Q is R. If Q is doubled, the new resultant is perpendicular to P. Then
P = Q
Q = R
Q = 2R
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Onejoule is equal to
0.1 N-m
1 N-m
10 N-m
100 N-m
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Whenever a force acts on a body and the body undergoes a displacement, then
work is said to be done
power is being transmitted
body has kinetic energy of translation
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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