(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hi, I need to figure out the initial velocity if an object of 1400 kilograms is subjected to a friction coefficient (sliding friction) of 0.4587 for 75.6 metres, and its final velocity after being subjected to that friction is 23.05 metres per second. How do I go about this?

2. Relevant equations

The only equations that I can think of that are relevant is:

Fr=μmg

distance=ut+0.5at^{2}

Ek=0.5mv

3. The attempt at a solution

Friction force= Fr=μmg

Fr=0.4587*1400*9.8=6293.364

Final momentum

p=mv

p=32270N

Final Kinetic energy

Ek=0.5mv

Ek=0.5*1400*23.05=16135J

I'm not sure how to do the distance equation as I don't know the amount of time.

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# How do I figure out the initial velocity of an object?

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