Corkscrew: A Physics Problem
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Transcript of Corkscrew: A Physics Problem
Corkscrew:A Physics Problem
Anika Jäckel, Sherry Gu, and Jahnavi Singh
The ProblemWhen standing thirty meters away, the top of
the corkscrew is at an angle of 35° at an eye height of 172 centimetres
The train takes twenty seconds to reach the top.
Suppose the train weighs fifteen tonnes and the ride uses an engine with five hundred horse power to pull the train up.
What is the efficiency of the engine?
The Solutionh = dtanθ + h
eye height
h = (30) tan(35) + 1.72h = 21 + 1.72h = 22.7 m
Engine = 500 hp
t = 20s
m = 15 tonne
172cm
35°
30 m
h
Efficiency = Wo x 100%
WI
Efficiency = (15 000) (9.8) (22.7) x 100% (500) (746) (20)
Efficiency = 3 336 900 x 100% 7 460 000
Efficiency = 45%
The engine has an efficiency of 45%.
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