ok, to get things started, i DO NOT, i repeat DO NOTwant the answers. i would just like an example, SHOWING how i would do this. Even if you can, give me what equation i would have to use, and HOW to use it. THNX!!! physics is hard lol.
Apply Newton's 2nd Law in each coordinate direction. Since we know that the car is decelerating, there is an acceleration in the x direction.
You can get the normal force from the y equation, and then the acceleration from the x equation.
That should give you a good start. If you have any more questions on this, feel free to ask.
What is an MGF Trophey?
Neither (a) nor (b) since those are speeds and not times.
a) How long will it take the trophey to brake to a stop from a speed of 60 km/h?
b) How long will it take the trophey to brake to a stop from a speed of 100 km/h?
In which case, following Topsquark's advice is a good start. You'll end up with an equation that gives you the braking duration for a given initial speed. Then you can plug in the values and compare the two durations. What you should find is that the duration obtained for part b) is much longer than expected because the braking time is proportional to energy which is proportional to velocity squared. This is why speeding is so dangerous.
Last edited by benit13; Apr 17th 2018 at 02:13 AM.
Yeah. I figured it was something like that. But he wanted to limit our responses, Hence to <expletive> eating grin.