The position of a car that is being slowed at a uniform rate is given by:(adsbygoogle = window.adsbygoogle || []).push({});

s(t) = 25t - 5.25t^2

where s is the displacement of the car from the point at which braking began and t is the

time in seconds after braking began. Find the velocity function for the car, including

its domain.

The answer is v(t) = 25 -11t 0 < or equal to t < or equal to 25/11

I assume I need to find the value of t first, then take a derivative, but I'm not sure

how to get t by itself

0 = 25t - 5.25t^2

5.25t^2 = 25t

and then I don't know what to do.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Simple velocity function

**Physics Forums | Science Articles, Homework Help, Discussion**