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 final 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 calculate the speed of the hockey puck, we need to determine the distance it traveled and the time it took.

1. **Distance**: The puck traveled from the blue line of the green team to the blue line of the orange team, which is 17⅔ meters (or approximately 17.67 meters).

2. **Time**: The initial time was 2:35 and the puck stopped at 2:32. We need to convert these times into seconds to find the difference:
- 2:35 = 2 minutes and 35 seconds = \( 2 \times 60 + 35 = 155 \) seconds
- 2:32 = 2 minutes and 32 seconds = \( 2 \times 60 + 32 = 152 \) seconds

The time difference (time taken for the puck to travel) is:
\[
155 \, \text{seconds} - 152 \, \text{seconds} = 3 \, \text{seconds}
\]

3. **Speed Calculation**: Speed is calculated as distance divided by time:
\[
\text{Speed} = \frac{\text{Distance}}{\text{Time}} = \frac{17.67 \, \text{meters}}{3 \, \text{seconds}} \approx 5.89 \, \text{meters/second}
\]

So, the speed of the hockey puck is approximately **5.89 meters/second**.

### Final Time
The final time when the puck was stopped is **2:32**.