A student releases the spring on a 1.8kg cart. After the launch, the spring returns to its natural length and the cart obtains a speed of 1.5m/s. Neglect any friction and drag impeding the motion. List the energy types at the initial and final time and whether work and loss (due to non- conservative forces) occur as well as the corresponding amounts of energy. initial: EPE work? no work loss? no loss final: KE How much energy was stored in the spring?

A student releases the spring on a 1.8kg cart. After the launch, the spring returns to its natural length and the cart obtains a speed of 1.5m/s. Neglect any friction and drag impeding the motion. List the energy types at the initial and final time and whether work and loss (due to non- conservative forces) occur as well as the corresponding amounts of energy. initial: EPE work? no work loss? no loss final: KE How much energy was stored in the spring?