1. What is the potential energy of a 40N shotput held 2m in the air? 2. What kinetic energy does a 0.2 kg golf ball possess if it is travelling at 40 m/'s? a. If the ball has half its mass but twice the speed, what kinetic energy would it then possess? 3. By considering the conservation of energy, what velocity will a 73 kg diver have just before entering the water if he jumps from an 1Im platform?4. A javelin thrower applies a 70N force to the javelin for 0.04 seconds. If the javelin moved 0.6m during this time, find: a. Average velocity of the javelin b. Work done during the throw c. Power of the throw 5. A 600N person scales a 23m wall during a 56s time period. How much mechanical work is done? How much mechanical power is generated? 6. Considering the conservation of energy, if a 2kg ball is dropped from a height of 1.5m, what is its velocity immediately before impact with the floor? 27. How much power is generated by a force of 600N applied to an object, which causes the object to move 7.5m in 2s? 8. How much power would be generated in the horizontal direction if a force of 600N is applied to an object at an angle of 65, causing the object to move 7.5m horizontally in 2s? 65 9. A 57 g tennis ball has a velocity of 33 m/'s just prior to ground contact. By considering energy conservation, determine the height the ball was dropped from. 310. At the top of a giant swing on the gymnastics high bar, Ali's velocity is 1 m's, and she is 3.5m high. If Ali's mass is 50 kg, what is her total mechanical energy at this instant? 11. What is the work done on the segment given the following information: ELK EAK EGp Frame 2 18.7 J 0.98 J 18.0 J Frame 100 9.2 J 0.2 J 7.5 J 12. What is the total energy of a system, given that mass= 4.2 kg; vx=0.18 m/s; vy= 3.45 m/s; W= 6.3 rad/s; moment of inertia= 0.07234 kg*m'; height of center of mass= 0.39m?