1. You are holding a mass of B kg on top of the 10.0 m height building. a. What is the potential energy of the object with respect to the ground. b. Now you decide to drop the object to the ground, what is the kinetic energy of the mass when it reaches the ground, how did you find it? What happens to the above potential energy? c. Calculate the velocity when it hits the ground by using energy conservation d. If the object drops on to the spring of spring constant C+1000 N/m, calculate the compress distance of the spring by considering all potential energy is converted to spring potential energy