Question

A 54-kg jogger is running at a rate of 3 m/s. What is the kinetic energy of the jogger?

*18 J
*81 J
*162 J
*243 J

Answer 1

You know the formula for kinetic energy?

Answer 2

that y im asking i forgot

Answer 3

Alright it is defined as:
\[\Large E_{k}=\frac{ 1 }{ 2 }mv ^{2}\]

Answer 4

do u know?

Answer 5

whats E

Answer 6

the energy.

Answer 7

m is the mass and v the velocity

Answer 8

so i divide 54 by 1/2?

Answer 9

TEACH ME PLZ

Answer 10

No, use the formula:
\[\large E_{k}=\frac{ 1 }{ 2 } \times 54 kg \times (3 \frac{ m }{ s })^{2}\]
Try evaluate it.

Answer 11

ok

Answer 12

What do you get as result?

Answer 13

7.5

Answer 14

That don't sound right. What did you press on your calc?

Answer 15

i used 0.5 as 1/2 and times it by 54 and times it by 3

Answer 16

did you square 3?

Answer 17

i did that just now and i got 46

Answer 18

Hmmmm sounds like you press something wrong. Here is what I got:
http://lmgtfy.com/?q=1%2F2+*+54+kg+*+(3+m%2Fs)%5E2

Answer 19

yea i dun goofs but thinx atleast i have the formula

Answer 20

No problem.