Question

A tight knot can be easily opened by using a long spanner .give reason

Answer 1

Answer:

By using a long spanner we can easily open a tight knot because the applied force is reduced.

Explanation:

• The product of the perpendicular distance from the force and the force's magnitude is called torque.
• To measure the force which is rotating an object, we calculate the value of torque.

When we use a long spanner, the perpendicular distance between the hand and the axis of the spanner increases. When the perpendicular distance increases, the force that has to be applied decreases.

So, by using a long spanner we can easily open a tight knot because the applied force is reduced.