The ________ is equal to the product of the force applied and radius of the shaft.

Explanation:

Torque

• It is the turning moment of a wheel measured in N-m and is the power required to overcome the resistance to move.
• Torque is a product of the force applied at a tangent and the radius of the shaft.

Additional Information

Moment of a force 

Varingon’s theorem states that if many coplanar forces are acting on a body, then the algebraic sum of moments of all the forces about a point in the plane of the forces is equal to the moment of their resultant about the same point.

• The moment of the resultant force about point O is given as, 
• Mo = (F1a) + (F2b) + (F3c) + M1 + M2
• The algebraic sum of moments of the forces forming a couple about any point in their plane is equal to the moment of the couple.
• The moment of a force about any point is the Product of force and the perpendicular distance between the point and line of action of the force.