3a) Calculate the force applied in a direction perpendicular to the handle of a wrench and at the end of the handle with a torque of 25N.m and length of the wrench (r) is 0.65m inclined at 90 degrees.

To find the force(F), the torque and length of the wrench is required. A longer wrench can exert a larger torque for the same amount of force.

3b) A disk weighs 40Ib and has a radius of gyration of 1.6ft. A 25ft Ib moment is applied and the spring has a spring constant of 20 Ib/ft. Find te angular velocity of the wheel when the point G moves 1.5 ft. The wheel starts from rest and rolls without slipping. The spring is initially unstretched.

Since the body rolls without slipping on a horizontal surface, only the spring force and couple moment M do work. Since the spring is attached to the top of the wheel, it will stretch twice the amount of displacement.