The three forces of 100N, 200N and 300N have their lines of action parallel to each other but act in the opposite directions. These forces are known as

20) Two like parallel forces are acting at a distance of 24mm apart and their resultant is 20N. If the lines of action of the resultant is 6mm from any given force, the two forces are

Answer is:

15N and 5N

Explanation:

Two like parallel forces are acting at a distance of 24mm apart and their resultant is 20N. If the lines of action of the resultant is 6mm from any given force, the two forces are 15N and 5N.

21) If a body is acted upon by a number of coplanar non-concurrent forces, if any

Answer is:

all of the above

Explanation:

If a body is acted upon by a number of coplanar non-concurrent forces, if any
rotate about itself without moving
move in any one direction rotating about itself
be completely at rest

22) A smooth cylinder lying on its convex surface remains in ______ equilibrium.

Answer is:

unstable

Explanation:

A smooth cylinder lying on its convex surface remains in unstable equilibrium.

23) Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

Answer is:

twice the area of the triangle

Explanation:

Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to twice the area of the triangle.

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The three forces of 100N, 200N and 300N have their lines of action parallel to each other but act in the opposite directions. These forces are known as

unlike parallel forces

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20) Two like parallel forces are acting at a distance of 24mm apart and their resultant is 20N. If the lines of action of the resultant is 6mm from any given force, the two forces are

15N and 5N

21) If a body is acted upon by a number of coplanar non-concurrent forces, if any

all of the above

22) A smooth cylinder lying on its convex surface remains in ______ equilibrium.

unstable

23) Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

twice the area of the triangle

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