If a 42kg rolling object slows from 11.5 m/s to 3.33 m/s how much work does friction do?

Explanation:

work done by friction = 1/2 x 42 x ( 3.33^2 - 11.5^2)

= 21 ( 11.08 - 132.25)

= 21 ( - 121.17 )

= - 2544.57 J

i'm only doing this for the points : (

explanation:

i'm only doing this the points

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.