Question

Give reason: 1.Why is it easier to open a door by applying the force at free end of it. 2.A spanner (or wrench) has a long handle. Why?​

Answer 1

Explanation:

1) The movement of door is a type of rotational movement due to the hinge connected to it. ... Same happens for the movement of the door also. That's why less amount of force is necessary to open a door when the force is applied on the free side of the door

2) A spanner have a long handle it is because, if the arm length is long, then the moment of force will be high, then, less force is only needed to do the desired action for the spanner. Thus, to reduce the required force, which is to be exerted, the spanner have a long handle, which also increases the moment of force

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Answer 2

Explanation:

The movement of door is a type of rotational movement due to the hinge connected to it.

And according to the torque theory related with the rotational force,we came to know that more amount of force is necessary when we are applying the force near the central portion of the rotation.

Same happens for the movement of the door also.

That's why less amount of force is necessary to open a door when the force is applied on the free side of the door.

hope u understand it