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
Like parallel forces
Coplanar non-concurrent forces
Coplanar concurrent forces

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Engineering Mechanics
The term 'Centroid' is

The point of suspension
None of the listed here
The same as centre of gravity
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

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Engineering Mechanics
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:

The change in momentum suffered by rubber ball is more than the lead ball
None of these
The change in momentum suffered by rubber ball is less than the lead ball
Both the balls undergo an equal change in momentum

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