Torque is the rotational equivalent of force — force times lever arm.
Try this
0.5
τ = r · F (F = 40 N, θ = 90°) in N·m = 20
Torque (turning effect)
Maximum when you push perpendicular to the lever arm (θ = 90°); zero when you push straight along it. Units: newton-metres (N·m).
Your turn
You push a wrench handle with 50 N, 0.30 m from the bolt, at 90°. What torque do you apply?
Watch out
It's not just 'how hard' you push — it's force times distance from the pivot. That's why a long spanner loosens a stubborn bolt a short one can't budge.
Torque