A dragster races down a 400 m strip in 8 seconds. Its distance, in metres, from the starting line after t seconds is s(t)=6t^2+2t
a) find the dragster's velocity and acceleration as it cross the finish line.
b) how fast was it moving 60 m down the strip?
I need help with part b.. I thought that i would use the acceleration formula i made up in part a but it did not work out since the a(t) formula in part a is a constant number > 12
Help with part b. thanks
All you need to do is set and use the quadratic formula to solve for . Take the solution and plug it into to obtain the velocity at 60m. If you don't remember the formula to solve for , just look it up on wikipedia. Or just factor the equation. I'm bad at factoring, so I always just use the quadratic formula.