Question

A ball is thrown vertically upward from the top of a 100 foot tower, with an initial velocity of 10 ft/sec. Its position function is s(t) = -16t2 + 10t + 100. What is its velocity in ft/sec when t = 2 seconds?

Answer 1

getting sick of seeing me yet, chris? :P

Velocity = d(position function)/dt
= ds/dt
= d(-16t2 + 10t + 100)/dt
= ....

Answer 2

-32t+10
-54

Answer 3

looks good to me!

Answer 4

thanks guys!

Answer 5

@chris215 GREAT job - u did most of the work here :)