A 76-kg skateboarder grinds down a hubba ledge that is 2.5 m long and inclined at 22 ∘ below the horizontal. Kinetic friction dissipates half of her initial potential energy to thermal and sound energies.
Why did the skateboarder grind down the hubba ledge? Because she couldn't find a ramp for her skateboard to do some sick tricks, so she decided to take matters into her own hands and create her own ramp! Way to be resourceful, skateboarder!
