Engineering Mechanics
Non-coplanar non-concurrent forces are those forces which

Meet at one point, but their lines of action do not lie on the same plane
Do not meet at one point but their lines of action lie on the same plane
None of these
Do not meet at one point and their lines of action do not lie on the same plane

ANSWER DOWNLOAD EXAMIANS APP

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:

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
The change in momentum suffered by rubber ball is less than the lead ball

ANSWER DOWNLOAD EXAMIANS APP