solve

For planets orbiting the Sun, (| explains why Earth orbits the Sun at a faster average speed than Mars. period (p) and orbital distance (a) obey the relation pe=a? The orbit of each planet is an ellipse, with the Sun at one ( explains why Earth's orbital speed varies over the course of each year. focus (| explains why applying a force to a baseball with your arm can cause the baseball to accelerate from rest to the speed at which it leaves your hand. explains why a spaceship with no forces acting on it will continue moving even if it has For any force, there is an equal and opposite reaction force [ tells us that, when you are pushing on a table, the table is pushing up on you with a force that precisely balances the force of your push. An object moves at constant velocity if there is no net force acting on it ; (| explains why Earth's distance from the Sun varies over the course of each year. Force equals mass times acceleration Aline between a planet and its Sun sweeps out equal areas in equal times