Question

If a train going 60 m/s hits the brakes and it

takes the train 1 minute and 40 seconds to
come to a complete stop, what is the train's
acceleration?

Answer 1

Answer with Explanation:

We can use the formula for acceleration to find the train's acceleration:

acceleration = (final velocity - initial velocity) / time

In this case, the initial velocity of the train is 60 m/s (since that's how fast it was going before it hit the brakes), the final velocity is 0 m/s (since the train comes to a complete stop), and the time it takes for the train to stop is 1 minute and 40 seconds, or 100 seconds.

So, plugging in the values we have:

acceleration = (0 m/s - 60 m/s) / 100 s

acceleration = -60 m/s / 100 s

acceleration = -0.6 m/s^2

Note that the negative sign indicates that the train is decelerating (slowing down), as opposed to accelerating (speeding up).