Two small carts on frictionless wheels are launched by an ideal spring and move together onto a frictionless ramp. Which of the following statements about the linear momentum and mechanical energy of the system is true?
Select all the statements that are correct.
A. Mechanical energy of the two carts system is conserved over the entire process
B. Linear momentum of the two carts system is conserved over the entire process
C. Mechanical energy is conserved immediately before and after the two carts are launched by the spring
D. Linear momentum is conserved immediately before and after the two carts are launched by the spring
E. Mechanical energy is conserved for the two carts while they move onto the ramp
F. Linear momentum is conserved for the two carts while they move onto the ramp
G. Neither Mechanical energy nor Linear momentum is conserved of the two carts system over the entire process