A boy sleds down a hill and onto a frictionless ice-covered lake at 10.0 m/s. In the middle of
the lake is a 1000-kg boulder. When the sled crashes into the boulder, he is propelled backwards
from the boulder. The collision is an elastic collision. If the boy’s mass is 40.0 kg and the sled’s
mass is 2.50 kg, what is the speed of the sled and the boulder after the collision? Show all work and sketches
A boy sleds down a hill and onto a frictionless ice-covered lake at 10.0 m/s. In...
A boy sleds down a hill and onto a frictionless ice-covered lake at 14.4 m/s. In the middle of the lake is a 1,000 kg boulder. When the sled crashes into the boulder, he is propelled over the boulder and continues sliding over the ice at 14.4 m/s. If the boy's mass is 40.0 kg and the sled's mass is 13.0 kg, what are the speeds (in m/s) of the sled and the boulder after the elastic collision? (Due to...
A 15.0 kg stone slides down a snow-covered hill, leaving point A at a speed of 10.0 m/s. There is no friction on the hill between points A and B, but there is friction on the level ground at the bottom of the hill, between B and the wall. After entering the rough horizontal region, the stone travels 100 m and then runs into a very long, light spring with force constant 2.0 N/m. The coefficients of kinetic friction between...