Physics, 18.12.2019 00:31, jenelllukus
Listena person on a ledge throws a ball vertically downward, striking the ground below the ledge with 200 joules of kinetic energy. the person then throws an identical ball vertically upward at the same initial speed from the same point. what is the kinetic energy of the second ball when it hits the ground? [neglect friction.]
a. 200 j
b. 400 j
c. less than 200 j
d. more than 400 j
Answers: 1
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