Question

Why it is easy to open and close the door by pulling or pushing it at its handle?

Answer 1

Answer:

As distance increases, torque increases and so the rotational effect increases. Hence, it is easier to push open a door by holding the knob than by pushing closer to the hinge.

Answer 2

Answer:

As distance increases, torque increases and so the rotational effect increases. Hence, it is easier to push open a door by holding the knob than by pushing closer to the hinge.