posted by .

Determine the final speed assuming that the time elapsed since t=0 is 2.4s.

Initial velocity is +12m/s
acceleration is +3.4m/s^2

I tryed doing 12/2.4 and then 12/3.4 but both of these were incorrect? I am not sure what to do.

Thank you.

Here is what you know:
V(t) = Vo + (a/2)t^2
Vo = 12 m/s
a = 3.4 m/s^2
t = 2.4 s

V(t=2.4) = 12 + 1.7 * (2.4)^2
= 21.792 m/s

When I put 21.792 m/s as my answer my online homework said it was incorrect. Why??

## Similar Questions

1. ### Physics

A ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, a ball dropped from rest from a building 15 m high. After how long will the balls be at the same height?
2. ### physics

A runner, beginning at rest, completed a 50 m run with a final speed of 6 m/s. Assuming constant acceleration. a) What was the average speed of the runner?
3. ### physics 20

A speed velocity of a a rocket with a mass of 0.25 kg passes from 15 m/s[up] to 40 m/s[up] in 0.60s. calculate the force of the escaped gasses of the rocket. **** that's what i've done, so far data: m = 0.25kg initial velocity = 15 …
4. ### physics 20

A speed velocity of a a rocket with a mass of 0.25 kg passes from 15 m/s[up] to 40 m/s[up] in 0.60s. calculate the force of the escaped gasses of the rocket. **** that's what i've done, so far data: m = 0.25kg initial velocity = 15 …
5. ### physics

Set a frictionless incline at various measured angles then determine the acceleration of a block by measuring the time it takes to increase from an initial speed to a final speed.If the angle is 20 and the initial speed is 0.68m/s …
6. ### physics

The initial velocity and acceleration of four moving objects at a given instant in time are given in the following table. Determine the final speed of each of the objects, assuming that the time elapsed since t = 0 s is 2.0 s. initial …
7. ### physic

The initial velocity and acceleration of four moving objects at a given instant in time are given in the following table. Determine the final speed of each of the objects, assuming that the time elapsed since t = 0 s is 2.2 s.
8. ### physics

A projectile is fired through the air. It is launched from the ground, and travels without interference from wind or air resistance, landing on a raised platform above the field. Compare the following values: 1-Initial speed vs. final …
9. ### physics

Erica throws a ball out of a window with a horizontal speed of 3.8m/s. If the ball hits the ground 15m away, how high up is the window?
10. ### Physics

The initial velocity and acceleration of four moving objects at a given instant in time are given in the following table. Determine the final speed of each of the objects, assuming that the time elapsed since t = 0 s is 2.0 s. Initial …

More Similar Questions