Question

Starting at rest at the edge of a swimming pool, a 72.0kg athlete swims along the surface of the water and reaches a speed of 1.20m/s by doing the work Wnc1 = 171J .
Find the nonconservative work, Wnc2, done by the water on the athlete in Joules.

Thanks!!

Answer 1

@perl please help me!!

Answer 2

what is Wnc1 = 17J

Answer 3

171 J

Answer 4

is this an online book, i might need some notes

Answer 5

i guess the water works on you by frictional drag

Answer 6

no it is masteringphysics assignment

Answer 7

no thats wrong :(

Answer 8

@perl

Answer 9

ok

Answer 10

still incorrect :(

Answer 11

so what is it? thanks

Answer 12

@perl

Answer 13

ok it shuld be

W = 171 - 1/2 (72)(1.2)^2 = 119.16

Answer 14

sorry 119

Answer 15

to 3 sig figs

Answer 16

in correct still

Answer 17

it says check signs

Answer 18

should it be negative?

Answer 19

yup its -119. thanks for the help

Answer 20

oh yes, since it is in the opposite direction?

Answer 21

-119

Answer 22

thanks appreciate it. i may tag your name in a bit for more help and i will give you more best repsonses!!

Answer 23

-119