Assuming no air resistance, all projectiles have: a. constant vertical motion and accelerated horizontal motion. b. constant vertical motion and constant horizontal motion. c. accelerated vertical motion and constant horizontal motion. d. accelerated vertical motion and accelerated horizontal motion.

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.