When a car is 100 meters from its starting position traveling at 60.0 m/s., it starts braking and comes to a stop 350 meters from its starting position in 8.3 s. calculate the acceleration.

Remember your kinematic equations for constant acceleration. One of the equations is , where  = final position,  = initial position,  = initial velocity, t = time, and a = acceleration. 

Your initial position is where you initially were before you braked. That means = 100m. You final position is where you ended up after t seconds passed, so = 350m. The time it took you to go from 100m to 350m was t = 8.3s. You initial velocity at the initial position before you braked was  = 60.0 m/s. Knowing these values, plug them into the equation and solve for a, your acceleration:


Your acceleration is approximately .

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.