- #1

- 10

- 0

## Homework Statement

As shown in the figure, ( a mass sliding down an incline of 60°) a car of 1000 kg mass start from the rest, it's velocity after 5s is? ( the kinetic fraction coefficient 0.1)

## Homework Equations

E1=E2

K1+U1=K2+U2

E1+Wf=E2

## The Attempt at a Solution

-Fk= mg cos 60 (0.1) = -490

K1+U1 + Wf = K2 + U2

We should cancel K1 and U2 because they equal zero

Then

Mgh -Fk d = 1/2 mv^2

Cancelling both m from each side

gh -Fk (vt) = 1/2 v^2

9.8*h+490(5v) = 1/2 v^2

Then I don't know what to do