Blues Puck
How do I determine how fast my son shoots a hockey puck?
He is doing a science project for school. We did several shots from the blue line (60 feet to the goal line, then another 12 to the boards - so 72 feet total distance). It took him .9 seconds from the time he hit the puck until it hit the boards. I know that MPH is figured using distance divided by time. SO in my feeble calculations, he would shoot the puck 80 mph. Is this correct?
We did do the experiment on an ice rink!
Not quite, you're right that speed=distance/time but you need to change the units so that you come out with MPH.
So straight off your son is shooting at a speed of 80 feet per second (72 feet/0.9 seconds)
72 feet= 72/5280=0.01363636... miles
0.9 secs = 0.9/3600=0.00025 hours
Therefore, speed = 0.0136/0.00025=54.5 MPH
So that's pretty fast!
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