- #1
Matt4936
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Homework Statement
A train which weighs 1.4406E4N hit a car with a mass of1470kg. The cars skids 15m at angle of 68° to the crossing and the coefficient of friction between the tyres and the road is 0.25. Find the initial velocity of the car entering the crossing.
Homework Equations
Gravitational force = Mass×Gravity
Normal Force = Gravitational force
Friction force = Coefficient of friction ×normal force
F=ma
Vector component equations...
The Attempt at a Solution
I got the acceleration to be -2.45m/s^2 and I was thinking of finding the vertical (north) component of the system using trigonometry which may corespond to the car's velocity but I was wondering what equation I should use to translate the north compotent into the initial velocity. Still I am unsure if that is even right because the north component directly coresponds to the car's frictional force.
Note that I divided the frictional force by the mass to find the acceleration.
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