The friction experienced by a body, when in motion, is known as

38) The static friction

bears a constant ratio to the normal reaction between the two surfaces

is independent of the area of contact, between the two surfaces

always acts in a direction, opposite to that in which the body tends to move

all of the above

Answer is:

all of the above

Explanation:

The static friction
* bears a constant ratio to the normal reaction between the two surfaces
* is independent of the area of contact, between the two surfaces
* always acts in a direction, opposite to that in which the body tends to move

39) Static friction is always ______ dynamic friction

Answer is:

greater than

Explanation:

Static Friction The friction experienced by a body, when it is at rest is known as static friction.

Dynamic Friction The friction experienced by a body, when it is in motion is called dynamic friction. Dynamic friction is also called as kinetic friction.

Dynamic friction always less than static friction.
The ratio of static friction to dynamic friction is always greater than one.

40) The angle of inclination of the plane at which the body begins to move down the plane, is called

Answer is:

angle of friction

Explanation:

The angle of inclination of the plane at which the body begins to move down the plane, is called angle of friction.

41) A body will begin to move down an inclined plane if the angle of inclination of the plane is ______ the angle of friction

Answer is:

greater than

Explanation:

A body will begin to move down an inclined plane if the angle of inclination of the plane is greater than the angle of friction

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The friction experienced by a body, when in motion, is known as

dynamic friction

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Related Engineering Mechanics MCQ with Answers

38) The static friction

all of the above

39) Static friction is always ______ dynamic friction

greater than

40) The angle of inclination of the plane at which the body begins to move down the plane, is called

angle of friction

41) A body will begin to move down an inclined plane if the angle of inclination of the plane is ______ the angle of friction

greater than

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