# physics

posted by
**venuya**
.

The angular position of a point on the rim of a 45.8 cm rotating wheel is given by θ(t) = 3.6 t2 − 2.8 t +7.5, where θ is measured in radians and t is measured in seconds.

What is the instantaneous speed v of the point at time t = 6.5 s?