r is the distance from the fixed axis of rotation, F is the force, and θ is the angle between r and F.
A torque can be exerted on a body with a fixed axis of rotation
a. only by a centripetal force.
b. only by a force directed radially outwards.
c. only by a tangential force.
d. only by a force with a component directed radially outwards.
e. by any force not pointing directly toward or away from the axis of rotation.
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