Question

The entrance door to a video store is pivoted about the hinges on the left side of the door. When you begin to push on the right side of the door to enter the store, what is the direction of the torque on the door? O clockwise out of the store O counterclockwise O upward O into the store

Answer 1

Since, torque = radial distance × force

$\vec\tau = \vec{r} \times \vec{F }$

T=TF Sino

Here theta is the angle between r and F.

So direction of torque will be perpendicular to both r and F .

Here , r is acting along the direction of door from left to right , and force is applied in forward direction . Hence the direction of torque is upward .

So correct option is 4 , upwards