What average net force is required to stop .

[EMPhotography]

What average net force is required to stop...

1. a 1500 kg vehicle is traveling at 75km/h. what is the average net force required to stop the vehicle within a 4.0 second interval?



2. f=ma? but i don't know acceleration?



3. force = 1500x (75/4) ?

 

[hage567]

1. a 1500 kg vehicle is traveling at 75km/h. what is the average net force required to stop the vehicle within a 4.0 second interval?



2. f=ma? but i don't know acceleration?



3. force = 1500x (75/4) ?

You can find the acceleration with the information they give you in the problem. Look up the definition of acceleration. Also remember to make sure your units are consistent throughout your calculations.