37. A child can throw a baseball at 20 mi/hr. A few professional baseball pitchers can throw a baseball at 100 mi/hr, which is 5 times faster than the child can throw. How much more energy does the pitcher give to the faster ball. a) 5 b) 25 c) 80 d) cannot be determined 38. A baseball and a ping pong ball both move with the same energy. Which ball has the higher speed? a) the baseball b) the ping pong ball c) neither they both have the same speed d) cannot be determined.
37. A child can throw a baseball at 20 mi/hr. A few professional baseball pitchers can throw a baseball at 100
mi/hr, which is 5 times faster than the child can throw. How much more energy does the pitcher give to the faster ball.
a) 5
b) 25
c) 80
d) cannot be determined
38. A baseball and a ping pong ball both move with the same energy. Which ball has the higher speed?
a) the baseball
b) the ping pong ball
c) neither they both have the same speed
d) cannot be determined.
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