Answer to Question #76720 in Mechanics | Relativity for Feebas Milotic

Question

:1. A 20-kg sled has gotten away. The sled starts from rest and goes down a straight down the hill. How fast will be the sled be at the bottom of the hill if it loses 100-m in altitude and friction is negligible?
2. Suppose that the sled in the previous example is observed to be 30 m/s at the bottom of the hill. How much energy is converted to thermal energy by friction on the way down?