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- 1. Cut and discard this bottom portion. Newton's Laws of MotionNewton's Laws of Motion
- 2. Cut and discard this bottom portion. Newton’s First Law An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Also called the law of inertia The greater an object’s mass, the greaterThe greater an object’s mass, the greater its inertia, and the larger the force neededits inertia, and the larger the force needed to overcome the inertia.to overcome the inertia. Newton’s 1st law
- 3. Cut and discard this bottom portion. •car suddenly stops and you strain against the seat belt because our bodies want to keep moving • the difficulty of pushing a dead car • car turns left and you appear to slide to the right • ketchup stays in the bottom (at rest) until you bang (outside force) on the end of the bottom • a headrest in a car prevents whiplash injuries during a rear-end collision (your head goes forward and then jerks backward) Examples of Newton’s 1st Law Examples of 1st law
- 4. Cut and discard this bottom portion. Newton’s 2nd Law F = M x A The greater the force, the greater the acceleration The greater the mass, the greater the force needed for the same acceleration Calculated by: F = ma (F = force, m = mass, a = acceleration) Newton’s 2nd Law
- 5. Cut and discard this bottom portion. Examples of Newton’s 2nd Law •hitting a baseball, the harder the hit, the faster the ball goes • accelerating or decelerating a car •The positioning of football players – massive players on the line with lighter (faster to accelerate) players in the backfield • a loaded truck versus an unloaded truck Examples of 2nd Law
- 6. Cut and discard this bottom portion. Newton’s 3rd Law For every action force, there is an equal and opposite reaction force. (Forces are always found in pairs.) Athlete pushes bar upwards. Bar pushes the athlete downwards. Bowling ball pushes pin to the right. Pin pushes bowling ball to the left. Newton’s 3rd Law
- 7. Cut and discard this bottom portion. Examples 3rd Law •Momentum of the car moving forward and the car comes to a sudden stop, our body pushes against the seat (action) belt and the seat belt pushes back (reaction). •When you lean on the wall to rest, the weight on the wall provides the reaction force and the wall pushes back on you (reaction force) with the same force. • Roller coaster ride- The train to the tracks. •Birds wings to the air. Examples of 3rd Law

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