## anonymous 2 years ago 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

1. anonymous

@kym02

2. anonymous

Do you remember the formula?

3. anonymous

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

4. anonymous

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

5. anonymous

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. anonymous

Thanks!

7. anonymous

Anytime!