- #1
VinnyCee
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Week long Force and Magnitude Problem
I have this problem that I have been working on for about a weel with no progress:
A car weighs 13,000 N and moves at 40 km / h (11.1 m / s) and it stops in 15 m, the force that stops the car is constant. What are the following?:
a) magnitude of the force stopping the car.
b) time required for stop.
I have tried everything I could think of. What equation shold I be using to figure this one?
For b) I have 15 m = (11.1 m/s) (X) s
then x = 1.35 s, right?
For a) I have (1.35 s) / (11.1 m / s) = 8.22 (13,000 N) = 106,089 N force stopping the car, right? (Probably not, but hopefully soomeone can tell me why.)
I have this problem that I have been working on for about a weel with no progress:
A car weighs 13,000 N and moves at 40 km / h (11.1 m / s) and it stops in 15 m, the force that stops the car is constant. What are the following?:
a) magnitude of the force stopping the car.
b) time required for stop.
I have tried everything I could think of. What equation shold I be using to figure this one?
For b) I have 15 m = (11.1 m/s) (X) s
then x = 1.35 s, right?
For a) I have (1.35 s) / (11.1 m / s) = 8.22 (13,000 N) = 106,089 N force stopping the car, right? (Probably not, but hopefully soomeone can tell me why.)
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