Acar turns into a driveway that slopes upward at a 9.0 ∘ angle. the car is moving at 7.5 m/s. if the driver lets the car coast, how far along the slope will the car roll before being instantaneously at rest and then starting to roll back? i've other people solve this with this ungodly equation with sin, but i don't know where the variables in the equation come to solve i used: i used vf=vi+at to solve for my time. vf=0 m/s vi=7.5m/s a=-9.81 m/s^2 t=t after solving for t, i got 0.7645 seconds. with that number, i used d=vit+.5at^2 to solve for d vi=7.5 m/s t=0.7645 s a=-9.81m/s^2 d=d after solving for d, i got 2.867 is my mistake in my method or something easily fixed in my math?