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Alisiya [41]
4 years ago
6

A motor with an input power of 100 Watts is connected to a flywheel . How long in units of hours must the motor operate to trans

fer 300000 joules to the flywheel assuming the process is 80% efficient
Physics
1 answer:
Tatiana [17]4 years ago
8 0
Power is the rate of work done given by dividing work done by time.Efficiency is the ratio of work output to work input
power input= 100 watts
power output = x
efficiency= 0.8 
thus 0.8 = x/100, therefore x = 80
power is given by energy times time
hence time = 80/300000 = 0.00026 seconds 
Time in hours = 0.00026/360 = 7.407 x 10 ∧7 hours
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<h3>What is the tension in the string?</h3>

The tension in the cable can be resolved into horizontal and vertical forces Tcosθ and Tsinθ respectively.

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Taking moments about the pivot:

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Solving for θ;

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T = 27.44/(sin 32.5 * 2.2)

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In conclusion, the tension in the cable is determined by taking moments about the pivot.

Learn more about moments of forces at: brainly.com/question/23826701

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