Homework SourseJack stands at rest on a skateboard The mass of Jack and the
Jack stands at rest on a skateboard. The mass of Jack and the skateboard together is 75kg. Ryan throws a 3.0 kg ball horizontally to the right at 4.0m/s to jack, who catches it. What is the final speed of jack and the skateboard?
Jack stands at rest on a skateboard. The mass of Jack and the skateboard together is 75kg. Ryan throws a 3.0 kg ball horizontally to the right at 4.0m/s to jack, who catches it. What is the final speed of jack and the skateboard?
Solution
By conservation of momentum
m? u = (m? + m?) v
3*4 = (75 + 3)*v
v = 0.16 m/s
================
Initial total energy = 0.5*m? u
