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Ashley1593
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The crankshaft in a race car goes from rest to 3540rpm in 2.6s. What is the crankshaft's angular acceleration? How many revolutions does it make while reaching 3540rpm?
 one year ago
 one year ago
Ashley1593 Group Title
The crankshaft in a race car goes from rest to 3540rpm in 2.6s. What is the crankshaft's angular acceleration? How many revolutions does it make while reaching 3540rpm?
 one year ago
 one year ago

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3psilon Group TitleBest ResponseYou've already chosen the best response.3
use \[\omega = \omega _o + \alpha t\] \[\omega_o= 0 \] since it starts from rest. so \[\omega = \alpha t\] solve for alpha\[\alpha=\frac{ \omega }{ t }\] Now just plug in and solve. Also I'm assuming your answer should be in radians/sec? \[\frac{ 3540rev/m }{ 2.6\sec } * \frac{ 2\pi }{ 1 rev }*\frac{ 1 \min }{60 \sec } = 142.58 rad/s^{2}\]
 one year ago

3psilon Group TitleBest ResponseYou've already chosen the best response.3
For the second part use the angular displacement formula \[\Delta \theta = \omega _o +\frac{ 1 }{ 2 } \alpha t^{2}\] and just plug in (note it starts from rest so omega initial = 0)
 one year ago

Omniscient1 Group TitleBest ResponseYou've already chosen the best response.0
Nice @3psilon
 one year ago

3psilon Group TitleBest ResponseYou've already chosen the best response.3
Make sense @Ashley1593
 one year ago

Ashley1593 Group TitleBest ResponseYou've already chosen the best response.0
yes thank you
 one year ago
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