4. A 0.30 kg pendulum is swinging. At the very top of its swing, it has no velocity (comes to a stop). At the bottom of its swing, it has a velocity of 6.5 m/s. What is the kinetic energy in each position? 5. Hawkeye pulls an arrow back with an average force of 100N over a distance of 40 cm. a. What is the potential energy of the arrow? b. At the moment of release the same arrow (0.16 kg) is measured to be flying at a speed of 22 mls. What is the arrow's kinetic energy? How much energy has been "lost\" in this process? 5.What is the efficiency of this bow and arrow system