# Somewhat physics...

• Jul 30th 2007, 02:45 PM
Somewhat physics...
A construction worker drops a bolt while working on high-rise building 320 m above the ground. After t seconds, the bolt has fallen a distance of s metres, where s(t)= 5t^2, 0 < (or equal to) t < (or equal to) 8. The function that gives the height of the bolt above ground at time R(t)= 320-5t^2. Use this function to determine the velocity of the bolt at t= 2.
• Jul 30th 2007, 04:52 PM
topsquark
Quote:

I have a problem with the equations. The coefficient in front of the $t^2$ in both of them is likely 0.5, not 5. Please check this.
$s^{\prime}(t) = 2 \cdot 0.5t = t$