A train is traveling at a speed of 80 km/h when the conductor applies the brakes. The train slows with a constant acceleration of magnitude .5 m/s^2. We want to find the distance the train travels from the time the brakes are applied until the train comes to a complete stop. Which kinematic formula would be most useful to solve for the target unknown?

The train will travel 493.817 meters until it stops completely.

Step-by-step explanation:

In this case, we know that train applies the brakes and decelerates at constant rate until rest is reached after travelling an unknown distance. Travelled distance (), measured in meters, can be found by using this kinematic formula:

(Eq. 1)

Where:

- Initial speed, measured in meters per second.

- Final speed, measured in meters per second.

- Acceleration, measured in meters per square second.

Now travelled distance is cleared within the formula:

If we know that , and , then the distance travelled by the train is:

The train will travel 493.817 meters until it stops completely.

3: 2

step-by-step explanation:

shorter piece is 2: 3, so just reverse it, and you get 3: 2

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63