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eefje

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## Homework Statement

A child starts from rest and slides on a sled first slope

down over a distance of 25 m . Then, the child slides further over a

horizontal plane. The angle of inclination is 35 ° and the kinetic

coefficient of friction between the sled and the snow is 0.100. The mass

of the child and the slide together 23 kg . What distance puts the child at the

horizontal section off before coming to a halt ?(122,93) What do I wrong? thank you

## Homework Equations

dE=-Fw.d Ek=(1/2m).v^2 Epot= m.g.h

## The Attempt at a Solution

first I go from the begining to the ground then second I start from the ground to when it stops

y=-cos35.G+N=0

N=23*9,81N*cos(35°)

= 184,8

Fw= Fn*0,1= 18,48

x=-cos55*23*9,81+18,48=m*a

-110=m*a

dE=-Fw*d

m*g*hB+0-(1/2m*v^2A)-0=-Fw*d

*(hB= cos55°*25=14,34)*23*9,81*14,34-1/2*23*v^2A=-18,48*d

v^2A=321

What distance puts the child at the

horizontal section off before coming to a halt

-1/2*m*v^2A=-Fw*d

-1/2*23*321+18,48=d

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