- #1
Haveagoodday
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Homework Statement
Hill, of height 100 m relative to where she starts. There are two ways up;
the steep way, where the slope is 30.0 degrees, and the not-so steep way, where the
slope is 15.0 degrees. The coefficient of kinetic friction between snow and sleigh is
fs k = 0,100. The mass of the sleigh is 8.00 kg, the mass of the child is 30.0kg.
a) How much work does the child have to do on the sleigh to get it to the
top of the hill: the steep way? The not-so-steep way? How much potential
energy does the sleigh now have relative to the starting point?
b) The child now sits down on the sleigh and slides down the steep side.
What is her speed as she gets to the bottom of the hill? What if she would
have gone down the not-so-steep side?
c) Assuming that after reaching the bottom, she can continue on a horizontal
surface of snow, how far does she slide before coming to a halt (steep and
not-so-steep)?
The Attempt at a Solution
a) In problem a i got
The amount of work done on the sleigh the steep way = 2425 J
The amount of work done on the sleigh the not steep way = 10813 J
Potential energy=7840 J
b) Speed down steep side= 40,3 m/s
Speed down not steep side= 35 m/s
c) I haven't solved c yet.
All answers are appreciated!
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