Posted by **Emma** on Wednesday, August 29, 2007 at 3:42pm.

4. An automobile is traveling at 30 km/hr. It accelerates at 3 m/s2 until it has covered 100 meters.. What is its new velocity?

I asked my teacher on what formula I should use and said I should use this one: V^2= Vo^2+2ax (V^2 is the velocit, Vo is the initial velocity, a is accerlation and x distance

I used that formuala and got 668.90 m/s

V^2= (8.3 m/s)^2+2(3m/s^2)(100 m)=668.90 m/s

I converted 30km/hr by doing this:

(30 km/hr)(1000 m/km)(1hr/3600)=8.3m/s

That answer my teacher said I was suppose to get is 25.9 m/s and that I could convert it to 93.2 km/hr.

## Answer this Question

## Related Questions

- Pysics Word Problem - 4. An automobile is traveling at 30 km/hr. It accelerates ...
- Physics - Having trouble determ the formulas for the follow problems. 2. If an ...
- Physics - Could you please check my answers and units. Thanxs! 1. An automobile ...
- Physics - Could you please check my answers and units.Also, help me with 3 and 4...
- Science - I have some equations that I would like checked. Thanxs! 1. An ...
- Physics - A ball travels at 59.78 m/s for a distance of 16.45768956 meters, then...
- physics - A rocket initially at rest accelerates at a rate of 99.0 meters/...
- physics - An automobile moving at a constant velocity of 15 m/s passes a ...
- algebra - The formula below can be used to find the distances (d) traveled by an...
- Physics - An automobile accelerates from rest at 2.4 m/s2 for 29 s. The speed is...