Your answer is partially correct. Try again. A flywheel is a solid disk that rot

Question

Your answer is partially correct. Try again. A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form a rotational kinetic energy and are being considered as a possible alternative to batteries in electric cars. The gasoline produces about 4.58 x 109 J of energy. How fast would a 44.4-kg flywheel Number'I16056.34 the tolerance is +/-2% with a radius of 0.499 m have to rotate to store this much energy? Give your answer in rewmin. burned in a 402-mile trip in a typical midsize car Question Attempts: Unlimited SAVE FOR LATE 29 egg

Explanation / Answer

Inertia of disk=0.5 ( MR^2) = 0.5 (44.4) (0.499^2) = 5.528 kg m^2 apprx

E = 1/2 I w^2

4.58 x 10^ 9 J = 0.5 (5.528 ) w^2

w^2= 16.57 x 10^8

w= 4.1 x 10^4 rad/sec = 391521.16 rev/min apprx

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.