Here is the question I am struggling with. Thanks! Late in ice hockey games, the
ID: 1759078 • Letter: H
Question
Here is the question I am struggling with. Thanks!Late in ice hockey games, the team that is losing sometimes"pulls" their goalkeeper off the ice to add an additional offensiveplayer and increase their chances of scoring. In such cases, thegoalie on the opposing team might have an opportunity to score intothe unguarded net 55.0 m away. Suppose you are the goaltender foryour university team and are in just such a situation. You launch ashot on the frictionless ice. You eventually hear a disappointing"clang" as the puck strikes a goalpost and misses exactly 2.50 slater. In this case, how fast did the puck travel? (Hint: assume343 m/s for the speed of sound) Here is the question I am struggling with. Thanks!
Late in ice hockey games, the team that is losing sometimes"pulls" their goalkeeper off the ice to add an additional offensiveplayer and increase their chances of scoring. In such cases, thegoalie on the opposing team might have an opportunity to score intothe unguarded net 55.0 m away. Suppose you are the goaltender foryour university team and are in just such a situation. You launch ashot on the frictionless ice. You eventually hear a disappointing"clang" as the puck strikes a goalpost and misses exactly 2.50 slater. In this case, how fast did the puck travel? (Hint: assume343 m/s for the speed of sound)
Explanation / Answer
Ok, The puck traveled at rate Rp where Rp=55m/tp where tp is equal to the time the pucktook to travel 55m. total time we'll call tf where tf =ts + tp and tf= 2.5 seconds.ts is the sound time. ts = 55m/343m/s = .1603s so tp = 2.34s So, Rp = 55m/2.34s or 23.5m/s