Engineering Mechanics
The forces, which meet at one point and their lines of action also lie on the same plane, are known as

Non-coplanar non-concurrent forces
Coplanar non-concurrent forces
Non-coplanar concurrent forces
Coplanar concurrent forces

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

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