- #1

lockmantican

- 3

- 0

2. i tried to use the equation for definition of acceleration

3. i set up my diagram and my question is; what is the initial velocity when the operator starts applying the brakes?

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- Thread starter lockmantican
- Start date

- #1

lockmantican

- 3

- 0

2. i tried to use the equation for definition of acceleration

3. i set up my diagram and my question is; what is the initial velocity when the operator starts applying the brakes?

- #2

aftershock

- 110

- 0

2. i tried to use the equation for definition of acceleration

3. i set up my diagram and my question is; what is the initial velocity when the operator starts applying the brakes?

The train is traveling at 28.6m/s when it starts to experience a negative acceleration of 1.35m/s^2 until it is traveling at 11.4m/s

So initial velocity is 28.6, final velocity is 11.4 and acceleration is -1.35

Just look at your kinematics equations, you should be able to use

Vf = Vo +at

- #3

lockmantican

- 3

- 0

The train is traveling at 28.6m/s when it starts to experience a negative acceleration of 1.35m/s^2 until it is traveling at 11.4m/s

So initial velocity is 28.6, final velocity is 11.4 and acceleration is -1.35

Just look at your kinematics equations, you should be able to use

Vf = Vo +at

why wouldn't the final velocity be 0 m/s

- #4

aftershock

- 110

- 0

why wouldn't the final velocity be 0 m/s

Why would it be? The train is starting at 28.6m/s and ending up at 11.4m/s so final velocity is 11.4

The final velocity would be zero if the train came to a stop, but it doesn't.

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