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?
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...
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...
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...