In international play hockey puck is struck by a "green team" hockey player at the blue line with 2:35 on the clock. It is stopped by an "orange team" player at the opposite blue line with 2:32 on the clock. On an international hockey rink the blue lines are 17⅔ m apart. Calculate the speed of the hockey puck.

Question

Responses

2:32 - 2:35 is -3 second. That is the time.
2:32 - 2:35 is -3 second. That is the time.

2:32 - 2:35 is 3 seconds. That is the time.
2:32 - 2:35 is 3 seconds. That is the time.

2:32 - 2:35 is -3 second, but time does not flow backwards so 3 seconds is the time.
2:32 - 2:35 is -3 second, but time does not flow backwards so 3 seconds is the time.

Answer 1

To calculate the speed of the hockey puck, we need to use the formula for speed, which is:

\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]

1. Distance: The blue lines are 17⅔ m apart, which can also be written as: \[ 17 \frac{2}{3} , \text{m} = \frac{53}{3} , \text{m} \approx 17.67 , \text{m} \]

2. Time: The puck was struck at 2:35 and stopped at 2:32. This is a difference of: \[ 2:35 - 2:32 = 3 , \text{seconds} \]

Now we can plug these values into the speed formula:

\[ \text{Speed} = \frac{17.67 , \text{m}}{3 , \text{s}} \approx 5.89 , \text{m/s} \]

Thus, the speed of the hockey puck is approximately 5.89 m/s.