A charging bull elephant with a mass of 5400 kg comes directly toward you with a speed of 4.30 m/s. You toss a 0.150-kg
Posted: Sat Jul 09, 2022 12:05 pm
A charging bull elephant with a mass of 5400 kg comes directly toward you with a speed of 4.30 m/s. You toss a 0.150-kg rubber ball at the elephant with a speed of 8.11 m/s. (a) When the ball bounces back toward you, what is its speed? (b) How do you account for the fact that the ball's kinetic ener- gy has increased?