## anonymous 5 years ago does anyone know: A vehicle parked on a slope, of inclination 20 degrees. The weight of the vehicle acts as a downward force of 10,000N. Find out: what is the magnitude of the resistance force the brakes must be exerting to prevent the vehicle moving down the slope.

1. anonymous

to prevent the vehicle moving down the slope, you have to make sure that $\sum_{}^{}Fx=0$ and $\sum_{}^{}Fy=0$

2. anonymous

Set up the usual coordinate system with horizontal axis parallel to incline surface

3. anonymous

$\sum_{}^{}Fx = 0 = 10000 \sin 20^{0} - fr$ fr= resistance force from the brakes so $fr=10000\sin 20^{o}$

4. anonymous

ohh thankyou i understand :)

5. anonymous

you're welcome