Disk a and b are identical and roll across a floor with equal speeds. Disk a rolls up an incline, reaching a max height h, and disk B moves up an incline that is identical except that it is frctionless. Is the max height reached by disk b greater than, less than, or equal to h?
Conservation of Energy
The Attempt at a Solution
Both disks have the same initial kinetic energies. When they go up the ramp, wouldn't friction oppose the way of motion for the wheels? I don't understand how friction would help the wheel move up higher.
I also thought that energy of disk a would be spent in heat from the friction too, making it have a max height less than that of disk b.
The answer is that disk b reaches a max height less than that of disk a