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4.

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

Help? @Michele_Laino

Answer 1

please you have to apply the subsequent formula:
\[E=\frac{ 1 }{ 2 }m*v ^{2}\]
where m= 1 Kg, and v=5.0 m/s
so?

Answer 2

please try to substitute your numerical data in the above formula!

Answer 3

Well.. Then wouldn't it be B? o.o

Answer 4

I think not B.

Answer 5

\[\frac{ 1 }{ 2 }*1*25=...\]

Answer 6

Lemme see, hold on

Answer 7

12.5? So D?

Answer 8

that's right! well done!

Answer 9

Yay, thanks