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xavior6
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Homework Statement
A Rocket Sled weighing 20000N is gliding at 24 m/s (North) on ice where friction is negligible. Suddenly it passes over a rough patch 22m long, which creates a friction force of 6000N (south). With what velocity does the sled leave the rough patch?
Homework Equations
Vi=Vf+ad
Vf(squared)=Vi(squared)+2ad
Fnet=Ff+Fa
Fnet= Ma
The Attempt at a Solution
I figured that the Vi of the sled when it hits the patch is 24 m/s since there is no acceleration. When it hits the patch, there are two forces on the object; one with -6000N and the other which is the original force applied. The sum of these constitutes the net force. The net force is also equal to the Mass of the object x Acceleration. The mass is 20000/9.81 which equals roughly 2038.7KG.
If I find acceleration, I would easily find the Vf of the object leaving the rough patch. The problem is, I have no idea how to find the forward force of the rocket sled, so I am left with 2 variables in 1 equation and I am stuck.
Can someone please tell me the way to solve this? Thank you.