O A 67-kg skateboarder grinds down a hubba ledge that is 2.3 m long and inclined at 15 • below the horizontal. Kinetic friction dissipates half of her initial potential energy to thermal and sound energies. Part A What is the coefficient of kinetic friction between her skateboard and the ledge surface? 1

O A 67-kg skateboarder grinds down a hubba ledge that is 2.3 m long and inclined at 15 • below the horizontal. Kinetic friction dissipates half of her initial potential energy to thermal and sound energies. Part A What is the coefficient of kinetic friction between her skateboard and the ledge surface? 1