Presentation on theme: "Newton’s Laws of Motion. Newton’s First Law The Law of Inertia Inertia- the tendency of an object to resist a change in motion. An object at rest."— Presentation transcript:
Newton’s First Law The Law of Inertia Inertia- the tendency of an object to resist a change in motion. An object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless it is acted upon by an outside force.
Newton’s First Law On Earth, gravity and friction are unbalanced forces that often change an object’s motion. The greater the mass of an object is, the greater its inertia, and the greater the force required to change its motion. Example: The tennis ball thrown in the air will continue until the force of gravity and friction will eventually stop the ball.
Newton’s Second Law The Law of Constant Acceleration Acceleration depends on the object’s mass & on the net force acting on the object. Acceleration= Net Force/ Mass Acceleration is measured in meter per second per second ( m/s²)
Newton’s Second Law To increase acceleration either decrease the mass or increase the force. Example: Rolling a golf ball and a bowling ball using the same force, the golf ball would have a greater rate of acceleration.
Newton’s Third Law If one object exerts a force on another object, then the second object exert a force of equal strength in the opposite direction on the first object. For every action there is an equal but opposite reaction. Example: When you hit a nail with a hammer, the hammer exerts a force on the nail. The nail exerts a force on the hammer, causing the motion of the hammer to stop.
Newton’s Third Law Momentum means “a quantity of motion” Momentum= Mass x Velocity The more momentum a moving has, the harder it is to stop. The conservation of momentum means when objects collide momentum is not lost but transferred from one object to another.