James, a 65-kg skin diver, shoots a 2-0kg spear with a speed of 15 m/SRC at a fish which is darting past him. How fast does James recoil when the spear is initially released?

The primary benefit of taking into account a child's interests while selecting exercise activities is that the child will a. play more willing with others b. succeed at their favorite activity c. allow parents to relax afterwards d. gain motivation to exercise select the best answer from the choices provided.

A1kg cart slams into a stationary 1kg cart at 2 m/s. the carts stick together and move forward at a speed of 1 m/sl. determine whether kinetic energy was conserved in the collision. use the law of conservation of energy to explain the collision

May someone explain how to do this question?