A car’s brakes decelerate it at a rate of -2.40 m/s2. If the car is originally travelling at 13 m/s and comes to a stop, then how far, in meters, will the car travel during that time?

Approximately .

Explanation:

Given:

Initial velocity: .

Acceleration: (negative because the car is slowing down.)

Implied:

Final velocity: (because the car would come to a stop.)

Required:

Displacement, .

Not required:

Time taken, .

Because the time taken for this car to come to a full stop is not required, apply the SUVAT equation that does not involve time:

.

In other words, this car would travel approximately before coming to a stop.

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the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.