Question

EASY! MEDAL AND FAN!
What is the kinetic energy of a 45 kg object moving at 13m/s

Answer 1

\[K = \frac{ 1 }{ 2 }m v^{2}\]

Answer 2

What represents m?

Answer 3

You have m and v given, substitute.

Answer 4

M is mass. Mass is measured in kilograms.

Answer 5

So it would be K=1/245x13^2?

Answer 6

Im very bad at this, Appreciate the help. :)

Answer 7

Yep.

Answer 8

Can you break it down real quick on how to do this? Im sorry, Trying to help my son...

Answer 9

You're on the right track. Put 13 for for v and 45 for m.

Answer 10

Yes, Then what? Do I square 13?

Answer 11

Yes. Like this \[K= \frac{ 1 }{ 2 }(45)(13)^{2}\]

Answer 12

\[13^{2} = 169\]So we can just do \[K = \frac{ 1 }{ 2 }(45)(169)\]

Answer 13

169

Answer 14

Just multiply through.

Answer 15

45x169?

Answer 16

Yes. times 1/2

Answer 17

7605 / 2?

Answer 18

Yes.

Answer 19

Then you get your answer. I have to go to work. :)

Answer 20

3802.5