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Engineering Mechanics

Engineering Mechanics
If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.

First
Third
Second
None of these

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Engineering Mechanics
If the body falls freely under gravity, then the gravitational acceleration is taken as

+8.9 m/s2
-9.8 m/s2
+9.8 m/s2
-8.9 m/s2

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Engineering Mechanics
Two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are

20 N and 5 N
15 N and 5 N
None of these
15 N and 15 N

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Engineering Mechanics
The three forces of 100 N, 200 N and 300 N have their lines of action parallel to each other but act in the opposite directions. These forces are known as

Unlike parallel forces
Coplanar concurrent forces
Like parallel forces
Coplanar non-concurrent forces

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Engineering Mechanics
If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.

None of these
Greater than
Less than
Equal to

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Engineering Mechanics
A pendulum which executes one beat per second is known as

Compound pendulum
Torsional pendulum
Second's pendulum
Simple pendulum

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