Why it gets easier to push open a door, the further you are from the hinge?

Question

Why it gets easier to push open a door, the further you are from the hinge?

In: 212

Answer 1

Torque. τ = F×r where F is the force you apply and r is the distance from the axis of rotation (the hinge). The further you are the the hinge, the less force you need to reach the necessary torque to rotate the door open.