Kinematics: 9.60 km Skid Marks, Initial Velocity Calculation

[mochilili]

The skid marks left by a decelerating car were 9.60 km long. If the car's acceleration was -2.00 m/s^2, what was the car's initial velocity?


any help is much appreciated!

 

[Kurdt]

Welcome to PF!

What have you tried so far? Are you sure the skid marks are 9.6 km long?

 

[mochilili]

thanks!

yep, the skid marks are that long. Its suppose to be a very fast car, lol.

 

[LowlyPion]

thanks!

yep, the skid marks are that long. Its suppose to be a very fast car, lol.

That looks more like a rocket on wheels.

 

[Kurdt]

Fair enough. What have you tried so far then? On this forum you can't receive help without some input from yourself. We help with homework we don't do it for you.

 

[mochilili]

lol, hey guys, i figured it out. i know i know, its probably the easiest question yall have seen, but its my 1st week in physics, lol.

 

[mochilili]

oh ic kurdt, cool, i'll do that from now on.

 

[Kurdt]

No problem. It just helps the student learn rather than being handed things on a plate and not learning anything. If you have any more questions please come back.