Question

Explain the turning effect of a force citing
an example.​

Answer 1

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The turning effect of a force is its ability to change the state of rotation of a body. This change may be from rest to motion, from motionbto rest or from one speed to another.

(1) When we push on a door, it turns about a vertical axis through its hinges.

(2) A wheel can be set into rotation by applying a tangential impulse on its rim. Once set into rotation, its speed of rotation can be increased by an impulse in the same direction as before, or decreased by a frictional force in the opposite direction.

In each of the cases above, the turning effect of a force causes a change in the rotational state of the body. Changing the direction of the force reverses the effect.

The turning effect of a force is called the torque.

[$\bf\large\underline\red{Note:-}$ The use of its old name 'moment of a force' should be avoided.]

Answer 2

Answer:

Explanation:

The turning effect of a forceis known as the moment. It is the product of the force multiplied by the perpendicular distance from the line of action of the force to the pivot or point where the object will turn.

Examples of turning effect of force:

A person pushing a swing will make the swing rotate about its pivot.

A worker applies a force to a spanner to rotate a nut.

A person removes a bottle's cork by pushing down the bottle opener's lever.

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