Question

A businesswoman is rushing out of a hotel through a revolving door with a force of 80 N applied at the edge of the 3 m wide door. Where is the pivot point and what is the maximum torque?

Answer 1

Answer:

Explanation:

Given

Force applied $F=80\ N$

Door is $d=3\ m$ wide

for gate to revolve Properly Pivot Point must be at center i.e. 1.5 from either end

Torque applied is $T=force\times distance$

Maximum torque

$T_{max}=F\times \frac{d}{2}$

$T_{max}=80\times \frac{3}{2}$

$T_{max}=120\ N-m$