# Physics

Hi, I have a question for physics

An object with mass m = 20 kg is released from a height h = 60 m above the ground. After 2 seconds, the object's quantity of energy

mvh
Oddbjørn

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1. In 2 seconds, it will fall a distance (1/2)gt^2 = 19.6 m. It will not have hit the ground yet. You can ignore the h = 60 m

The speed will have reached a value
V = gt = 19.6 m/s

The KINETIC energy will have increased by (1/2) m (19.6)^2 . If you include potential energy, there will be no change.

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posted by drwls

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