In deciding whether to use a technology, people must analyze the good effects and the bad effects of using a certain technology. People should weigh the consequences well. In deciding, it should be kept in the mind that the goal of using something should benefit people in a good way.
The answer is D, the amount of energy stays the same.
I think it was Isaac Newton
If you were given distance & period of time, you would be able to calculate the speed.
Hope this helps!
Hey there!
the answer is
C. a tennis racket striking a tennis ball
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