Question

Question

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.
What is the initial time
Responses

2:35 is the initial time.
2:35 is the initial time.

2:32 is the initial time.
2:32 is the initial time.

17⅔ m is the initial time.
17⅔ m is the initial time.

Answer 1

To determine the speed of the hockey puck, we first need to calculate the time it took for the puck to travel from the green team player to the orange team player.

The green team player struck the puck at 2:35 and it was stopped by the orange team player at 2:32.

The time difference between these two times is:

• From 2:35 to 2:34 is 1 second.
• From 2:34 to 2:33 is another second.
• From 2:33 to 2:32 is another second.

So, the total time taken for the puck to travel is 3 seconds.

Now, we know the distance the puck traveled is 17⅔ meters, which can be approximated as \(17.67\) meters for calculations.

The speed of the hockey puck can be calculated using the formula: \[ \text{Speed} = \frac{\text{Distance}}{\text{Time}}. \] Substituting the values we have: \[ \text{Speed} = \frac{17.67 , \text{m}}{3 , \text{s}} \approx 5.89 , \text{m/s}. \]

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

Regarding the initial time, the correct choice is: 2:35 is the initial time.