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stupidinphys
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Problem with Work Done by Friction, Velocities--Extremely Hard
Here is the known data: The track has to be 1500m max, less track can be used. There is a minimum of 3 hills (you decided how steep and how high they are). There are two turns (track makes one lap). The coefficent of friction around the turns is zero (you decide the radius of curvature of the turns and the angle of the bank of the turns so your sled doesn't go off track). There is a massless cable on a frictionless pulley that pulls your sled to the top of the first hill with an acceleration of 0.5m/s^2. The mass of the sled is 350kg, with 2 people it is a max of 600kg. The sled can never exceed 25m/s. At the end of the track there is a natural braking system with a coefficent of fricition of 0.3.
A)Since the sled had an accelaeration going up that first hill, it has an initial velocity upon reaching the first hill. Determine that velocity assuming the sled started from rest.
B) Determine work done by fricition going up each hill, down each hill, and along any straightaway of a fully loaded sled.
C) Dtermine the velocity at the top and bottom of each hill, and at the beginning and end of each straight away.
D) Based on the velocity of your sled going into each turn determine the agnle required to bank the turn to keep your sled on the track
E) Based on the velocity of your sled coming into the final straightaway before it stops, dtermine how much track is needed for the frictional forces to do their work and bring that sled to a safe stop.
Not sure, I suck at physics and our teacher has done a good job of teaching
Need help in any form I can get it. Been working on this by myself for a week and have gotten no where
Homework Statement
Here is the known data: The track has to be 1500m max, less track can be used. There is a minimum of 3 hills (you decided how steep and how high they are). There are two turns (track makes one lap). The coefficent of friction around the turns is zero (you decide the radius of curvature of the turns and the angle of the bank of the turns so your sled doesn't go off track). There is a massless cable on a frictionless pulley that pulls your sled to the top of the first hill with an acceleration of 0.5m/s^2. The mass of the sled is 350kg, with 2 people it is a max of 600kg. The sled can never exceed 25m/s. At the end of the track there is a natural braking system with a coefficent of fricition of 0.3.
A)Since the sled had an accelaeration going up that first hill, it has an initial velocity upon reaching the first hill. Determine that velocity assuming the sled started from rest.
B) Determine work done by fricition going up each hill, down each hill, and along any straightaway of a fully loaded sled.
C) Dtermine the velocity at the top and bottom of each hill, and at the beginning and end of each straight away.
D) Based on the velocity of your sled going into each turn determine the agnle required to bank the turn to keep your sled on the track
E) Based on the velocity of your sled coming into the final straightaway before it stops, dtermine how much track is needed for the frictional forces to do their work and bring that sled to a safe stop.
Homework Equations
Not sure, I suck at physics and our teacher has done a good job of teaching
The Attempt at a Solution
Need help in any form I can get it. Been working on this by myself for a week and have gotten no where