Abus contains a 1500 kg flywheel (a disk that has a 0.600 m radius) and has a total mass of 10,000 kg. (a) calculate the angular velocity the flywheel must have to contain enough energy to take the bus from rest to a speed of 20.0 m/s, assuming 90.0% of the rotational kinetic energy can be transformed into translational energy. (b) how high a hill can the bus climb with this stored energy and still have a speed of 3.00 m/s at the top of the hill?

H = 19.92 m

Explanation:

Given data:

weight of flywheel 1500 kg

disk radius is 0.6 m

total mass of bus is 10,000 kg

Kinetci energy of wheel is given as

where

I denotes moment of inertia

is angular velocity

from information given in question 90% of K.E( flywheel) = K.E of bus

K.E of bus

substituing all value in above equation

HERE   M = 1500 kg and r = 0 , so

solving for angular velocity

part b

by energy conservation theorem

0.90 Kr = Ke +  Ue

solving for H

H = 19.92 m

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

terd muffin is the correct answer