Consider a cannon-ball of mass 8 kg fired vertically up from the ground with an initial speed of 120 m/s. We ignore the effects of air resistance. (a) Apply the kinematic equations for linear motion under a constant acceleration to find how high the cannon-ball goes. (b) Use the definition of work done to calculate the work done by gravity for the upward trip, i.e., from the time the cannon-ball leaves the cannon (taken to be the ground) until it reaches the highest point. Use your result to demonstrate explicitly that the change in kinetic energy is the work done by the net force on the object for the upward trip

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