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 .

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