Lee is rolling along on her 4.0 kg skateboard with a constant speed of 3.0 m/s when she jumps off the back and continues forward with a velocity of 2.0 m/s relative to the ground. This causes the skateboard to go flying forward with a speed of 15.5 m/s relatives to the ground. What is Lee's mass? Use a momentum bar chart to document the changes in momentum.

Lee is rolling along on her 4.0 kg skateboard with a constant speed of 3.0 m/s when she jumps off the back and continues forward with a velocity of 2.0 m/s relative to the ground. This causes the skateboard to go flying forward with a speed of 15.5 m/s relatives to the ground. What is Lee's mass? Use a momentum bar chart to document the changes in momentum.