• Gravitational force- is also known as weight
• The second law explains how to calculate the acceleration of an object if its mass and the forces acting on it are both known.
• In circular motion, the centripetal force is always perpendicular to the motion.
• Terminal Velocity is reached when the force of gravity is balanced by air resistance.
• An object can speed up, slow down, turn in direction of the net force, if unbalanced forces act upon.