Mechanical Engineering - Engineering Mechanics

36. 

The kinetic energy of a body __________ upon its mass and velocity.

A. does not depend
B. depends

Answer: Option B

Explanation:

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37. 

According to Newton's first law of motion,

A. every body continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
B. the rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts
C. to every action, there is always an equal and opposite reaction
D. none of the above

Answer: Option A

Explanation:

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38. 

The moment of inertia of a square of side (a) about an axis through its centre of gravity is

A. a4/4
B. a4/8
C. a4/12
D. a4/36

Answer: Option C

Explanation:

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39. 

The velocity ratio of a single purchase crab winch can be increased by

A. increasing the length of the handle
B. increasing the radius of the load drum
C. increasing the number of teeth of the pinion
D. all of the above

Answer: Option A

Explanation:

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40. 

The motion of a wheel of a car is

A. purely translation
B. purely rotational
C. combined translation and rotational
D. none of these

Answer: Option C

Explanation:

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