# Mechanical Engineering - Engineering Mechanics

### Exercise :: Engineering Mechanics - Section 1

31.

The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as

 A. static friction B. dynamic friction C. limiting friction D. coefficient of friction

Explanation:

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32.

The centre of gravity of an equilateral triangle with each side a, is __________ from any of the three sides.

 A. 3a/2 B. 23a C. a/23 D. 32a

Explanation:

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33.

The distance, between the point of projection and the point where the projectile strikes the ground, is known as range.

 A. Correct B. Incorrect

Explanation:

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34.

The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as

 A. principle of independence of forces B. principle of resolution of forces C. principle of transmissibility of forces D. none of these

Explanation:

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35.

The triangle law of forces states that if two forces acting simultaneously on a particle, be represented in magnitude and direction by the two sides of a triangle taken in order, then their resultant may be represented in magnitude and direction by the third side of a triangle, taken in opposite order.

 A. True B. False