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Civil Engineering - Applied Mechanics

Exercise : Applied Mechanics - Section 4
21.
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centres lie on
a point
a straight line
two straight lines
a triangle.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
A ball of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/sec hits an identical stationary ball B on the table. If the impact is perfectly plastic, the velocity of the ball B just after impact would be
zero
5 m/sec
10 m/sec
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
If α is the angular acceleration of a compound pendulum whose angular displace ment is θ, the frequency of the motion is
2πα/θ
4πα/θ
2πα - θ.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
If two forces each equal to T in magnitude act at right angles, their effect may be neutralised by a third force acting along their bisector in opposite direction whose magnitude will be
2 T
1/2 T
2 T
3 T
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Energy may be defined as
power of doing work
capacity of doing work
rate of doing work
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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