Chapter 11 Flashcards
Inertia
The tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts on the object.
Newton’s First law of motion
States that an object at rest remains at rest and an object in motion remains its velocity unless it experiences an unbalanced force.
Newton’s Second law of motion
States that the unbalanced force acting on an object equals the object’s mass times its acceleration.
Free fall
The motion of a body when only the force of gravity is acting on the body.
Terminal velocity
The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity.
Projectile motion
The curved path an object follows when thrown, launched, or otherwise projected near the surface of Earth.
Laws of universal gravitation
A particle attracts every other particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.
Weight
The force exerted on a body by gravity. W=mg
Apparent weightlessness
Occurs when there is no force of support acting on a body.
Newton’s third law of motion
States that for every action force, there is an equal and opposite reaction force.
Action force
Action force is a force acting in one direction
Reaction force
A reaction force is a force acting in the opposite direction that the action force is
