torque

So I've always been taught that the formula for torque is T=FcosTheta * R .............however this princeton review practice problem on torque is using the formula T= FSinTheta * R When solving for torque do we always use Sin in the torque formula?? Or is this just a bad question...because...

The question asks: "If a person starts at the rim of a spinning platform and is pushed radially toward the central axis by a moving exterior wall, then what happens to the normal force felt by that person due to the wall?" Answer is: "It decreases, since r decreases" I used a= v^2/r but TBR...

A laboratory pan balance is shown In general when calculating the mass of the pan neglecting the mass of the rod: A- is possible if the fulcrum is placed at the center of mass of the whole balance B- is possible if the center of mass of the rod is the pivot point C- is not possible D- is...