# Mechanical Engineering - Engineering Mechanics

### Exercise :: Engineering Mechanics - Section 1

21.

The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction.

 A. equal to B. less than C. greater than

Answer: Option A

Explanation:

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22.

In the shown figure, if the angle of inclination of the plane is increased, then acceleration of the system will A. increase B. decrease C. remain the same

Answer: Option B

Explanation:

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23.

The total time taken by a projectile to reach maximum height and to return back to the ground, is known as time of flight.

 A. Yes B. No

Answer: Option A

Explanation:

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24.

The frequency of oscillation of a torsional pendulum is

 A. B. C. D. Answer: Option D

Explanation:

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25.

The range of a projectile is maximum, when the angle of projection is

 A. 30° B. 45° C. 60° D. 90°

Answer: Option B

Explanation:

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