Engineering Mechanics
Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

120 N
40 N
20 N
None of the listed here

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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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