Aspring-loaded dart gun is compressed a distance d, then fired straight up into the air. the dart reaches a maximum height of 24 m. for a second trial, the spring is compressed a distance of 0.50d. what is the maximum height of the dart in the second trial? assume that the effect of friction and other nonconservative forces is negligible.

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.