Thread: Instantaneous Velocity calculus

s(t)= -16t^2 + 400t + 5

What is the Instantaneous Velocity after 8 sec?

I'm not exactly sure what to do..

Hello civiliam

Originally Posted by civiliam

s(t)= -16t^2 + 400t + 5

What is the Instantaneous Velocity after 8 sec?

I'm not exactly sure what to do..

The velocity at any instant is given by the value of at that instant. So you need to differentiate your function (are you OK with that?), to get a formula for in terms of . Then plug in the value . (You should get the answer .)

Can you complete it now?

Grandad

Thanks man did it got exactly that