# An experimental flywheel, used to store energy and replace an automobile engine, is a solid disk of

## Question:

An experimental flywheel, used to store energy and replace an automobile engine, is a solid disk of mass 200.0 kg and radius 0.40 m.

(a) What is its rotational inertia?

(b) When driving at 22.4 m/s (50 mi/h), the fully energized flywheel is rotating at an angular speed of 3160 rad/s. What is the initial rotational kinetic energy of th flywheel?

(c) If the total mass of the car is 1000.0 kg, find the ratio of the initial rotational kinetic energy of the flywheel to the translational kinetic energy of the car.

(d) If the force of air resistance on the car is 670.0 N, how far can the car travel at a speed of 22.4 m/s (50 mi/h) with the initial stored energy? Ignore losses of mechanical energy due to means other than air resistance.

## Step by Step Answer:

**Related Book For**

## College Physics With An Integrated Approach To Forces And Kinematics

**ISBN:** 978-1260547719

5th Edition

**Authors:** Alan Giambattista