Question

The position of an object as a function of time is given x=bt^2 -ct , where b=2.0 m/s^2 and c=6.7 m/s, and x and t are in SI units. What is the instantaneous velocity of the object when t=2.2?

Answer 1

So x=2t^2-6.7t.
When t=2.2,
x=2(2.2)^2-6.7*2.2
x=-5.06...

Answer 2

Oh wait

Answer 3

Sorry

Answer 4

You need the derivative

Answer 5

x=2t^2-6.7t.
The derivative is
4t-6.7
So the velocity is 2.1 m/s

Answer 6

This is Calc right?

Answer 7

this right answer

Answer 8

Calc-Based Physic.)