How to find the Force ?

Question

A toyota sienna with a gross weight of 5300 lbs is parked on a street with slope of 8 degrees. Find the force required to keep Sienna from rolling down the hill ? . What is the force perpendicular to the hill?

Answer 1

F = Downhill force = 5300 x sin 8°
F = 737.6 lbs = Required uphill force to prevent rolling down the hill.
Perpendicular force = 5300 cos 8°
= 5248.4 lbs.