Recent content by IDespisePhysics

So, I need to find an equation that equals V avg? If so, I have Vi+Vf/2. I'm not sure if acceleration is constant in that equation. And if that is correct, I can use Vavg / x = t, right?

Hello haruspex, The formula you suggested; I've never seen it before. What does it mean?

Would I end up using quadratic or is that too far?

Vi = 88 ft per second a= 0 m/s ^2 x = 1 ft Would I have to use the kinematics equation, x=vit + (1/2)at^2, in order to find time? Also, are any of my givens incorrect?

I'm not sure. I do know that Impulse is a force applied over a period of time. J=Ft And I also know that mΔv = Ft. I'm so sorry. I honestly don't understand this question. I get that I need to find time in order to help find acceleration to find ∑F. However, this is a collision problem, so...

Do you mean time? If so, I think I would.

Homework Statement A car is traveling at 60.0mph when it collides with a stonewall. The car comes to rest after the first foot of the car is crushed. What was the average horizontal force acting on a 150lb driver while the car came to rest? Homework Equations I'm not a hundred percent sure...

Thank you! I got the answer now! :D

Would I have to convert the 95 km/hr?

Homework Statement A car is traveling at 95 km/hr. The driver steps on the brakes and the car comes to a stop in 60 meters. What is the car's acceleration? Homework Equations My issue might be which formula is correct but, I believe I would use, vf^2=vi^2+2ax The Attempt at a Solution...