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needhelpfastplease Group Title What is the kinetic energy of a 1.0-kg billiard ball that moves at 5.0 m/s? A. 5.0 J B. 6.5 J C. 10.0 J D. 12.5 J 6 months ago 6 months ago

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1. needhelpfastplease

@kym02

2. kym02

Do you remember the formula?

3. needhelpfastplease

i thiink so 1/2 times mass times (velocity squared) 12mv2

4. needhelpfastplease

he equation for finding Kinetic Energy KE is half the mass m times velocity v squared. KE=12mv2

5. kym02

correct! so since$K _{E}=\frac{ 1 }{ 2 }mv ^{2}$ then, $\frac{ 1 }{ 2 } \times 1.0kg \times 5.0 ms ^{-1}$ $=12.5 J$ So, the answer is D.

6. needhelpfastplease

Thanks!

7. kym02

Anytime!