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Chemistry

Answered

You serve a volley ball with the mass 2.1kg the leaves your hand with speed of 30m/s the ball has energy?

Sagot :

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Answer:

945J

Explanation:

You have just given the ball kinetic energy, which is given by the following equation:

Ek=0.5×m×v2

So the energy the ball has the moment after you hit it is:

Ek=0.5×2.1×(30)2

Ek=945J

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