Suppose that you are viewing a soccer game from a helicopter above the playing field. two soccer players simultaneously kick a stationary soccer ball on the flat field; the soccer ball has mass 0.420 kg. the first player kicks with force 162 n at 9.0° north of west. at the same instant, the second player kicks with force 215 n at 15° east of south. find the acceleration of the ball in i ^ and j ^ form.

Acrow drops a 0.11kg clam onto a rocky beach from a height of 9.8m. what is the kinetic energy of the clam when it is 5.0m above the ground? what is its speed at that point?

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.

Each neuron shown in this figure innervates a group of muscle fibers. what is the term for a group of muscle fibers innervated by a single neuron?