Engineering Mechanics
The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

Coplanar concurrent forces
Non-coplanar concurrent forces
Coplanar non-concurrent forces
None of these

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

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