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bktoday55

bktoday55 yorum yaptı, 17 Aralık 2021 21:21
You do work only when in contact with the ball.
bktoday55 yorum yaptı, 17 Aralık 2021 21:18
Work is equal to the energy required to accomplish a task. When you throw a tennis ball in the air, your arm exerts a force on it. This force is enough to propel it upward against the pull of grav...