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gravity The force that attracts a body toward the center of the earth, or toward any other physical body having mass
air The invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen.
resistance The refusal to accept or comply with something; the attempt to prevent something by action or argument.
motion The action or process of moving or being moved
action The fact or process of doing something, typically to achieve an aim
reaction An action performed or a feeling experienced in response to a situation or event
free fall Downward movement under the force of gravity only: "the path of a body in free fall".
orbit The curved path of a celestial object or spacecraft around a star, planet, or moon, esp. a periodic elliptical revolution.
rolling friction Rolling resistance, sometimes called rolling friction or rolling drag, is the resistance that occurs when a round object such as a ball.
Newtons 1st law first law of motion: a body remains at rest or in motion with a constant velocity unless acted upon by an external force.
Newtons 2nd law second law of motion: the rate of change of momentum is proportional to the imposed force and goes in the direction of the force.
Newtons 3rd law third law of motion: action and reaction are equal and opposite.
Created by: karenvanity