Answer:

Explanation:
Hello,
In this case, since the hockey puck was moving at 34 m/s and suddenly stopped (final velocity is zero) in 7 seconds, we can first compute the acceleration via:

In such a way, we can compute the displacement via:

Best regards.
Average acceleration = (change in speed) / (time for the change)
Average acceleration =
(speed at the end of the 14 seconds) / (14 seconds)
You would have to put the number together
The answer is b because the sun's surface temperature is 5,778 K.