Question

If the position of an object is given by s(t)=−85t+2 feet, then at t=−4 seconds,
the velocity of the object is
the speed of the object is
the acceleration of the object is

Answer 1

The velocity of that object will be the first derivative, and the acceleration will be the second derivative.

Answer 2

\[s'(t) = -85\\s''(t) = 0 \]

Answer 3

Now plug -4 in.

Answer 4

Does that help?

Answer 5

yes thanks!

Answer 6

You're welcome :)

Answer 7

the speed cant be zero can it?

Answer 8

No, it can't.

Answer 9

ok i got it thanks!

Answer 10

yw