Please explain how to solve the problem in detail and provide the correct answer

Question

Please explain how to solve the problem indetail and provide the correct answer. Will ratelifesaver! Thank you.
A car is designed to get its energy from a rotating flywheel with aradius of 1.50 m and a mass of400 kg. Before a trip, the flywheel isattached to an electric motor, which brings the flywheel'srotational speed up to 5000rev/min. (a) Find the kinetic energy stored in theflywheel.
1 J
(b) If the flywheel is to supply energy to the car as would a15.0-hp motor, find the length of timethe car could run before the flywheel would have to be brought backup to speed.
2 h Please explain how to solve the problem indetail and provide the correct answer. Will ratelifesaver! Thank you.
A car is designed to get its energy from a rotating flywheel with aradius of 1.50 m and a mass of400 kg. Before a trip, the flywheel isattached to an electric motor, which brings the flywheel'srotational speed up to 5000rev/min. (a) Find the kinetic energy stored in theflywheel.
1 J
(b) If the flywheel is to supply energy to the car as would a15.0-hp motor, find the length of timethe car could run before the flywheel would have to be brought backup to speed.
2 h

Explanation / Answer

(a) the kinetic energy stored in the flywheel.
=5000*2/60=523.6 rad/s K=1/2*I*2=1/4*m*R2*2 R=1.5 m m=400 kg =>K=6.2*107 J (b)1hp=736 W => time=K/15hp=5587 s=> time=1.55 hours (b)1hp=736 W => time=K/15hp=5587 s=> time=1.55 hours

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