Engineering Mechanics - Mechanical Engineering Questions and Answers

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When a body of mass m attains a velocity v from rest in time t, then the kinetic energy of translation is

mv²

mgv²

0.5 mv²

0.5 mgv²

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The unit of angular velocity is

m/min

rad/s

revolutions/min

both (B) and (C)

none of these

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If a number of forces are acting at a point, their resultant is given by

(∑V)² + (∑H)²

\(\sqrt{(\sum V)^2 + (\sum H)^2}\)

(∑V)² +(∑H)² +2(∑V)(∑H)

\(\sqrt{(∑V)2 +(∑H)2 +2(∑V)(∑H)}\)

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A force acting in the opposite direction to the motion of the body is called force of friction.

Agree

Disagree