1.The block brake is used to stop the wheel from rotating when the wheel is subjected to a couple moment M0. Determine the smallest force P that should be applied if the coefficient of static friction between the block and wheel is μs.
2. Determine the potential energy of the pendulum with respect to i) datum 1 and ii) datum 2.
3. Determine the elastic potential energy of the system, where x0 is the original length of the spring
4.The pendulum consists of a plate having a weight 12 lb and a slender road having a weight of 4 lb. Determine the mass moment of inertia of the pendulum about point O.