Motion & Forces 6. Newton’s 2nd Law of Motion

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Presentation transcript:

Motion & Forces 6. Newton’s 2nd Law of Motion

Newton’s 2nd Law is the law of motion, force, and acceleration Force = Mass  Acceleration F = MA

Newton’s 2nd Law pertains to forces that are unbalanced Motion is occurring

The 2nd law states that acceleration is dependent on 2 variables Force acting on an object (F) Mass of the object (M)

and inversely on the mass of the object The acceleration of an object depends directly on the force acting on the object and inversely on the mass of the object More M Less A Less A More M

When one player checks another the force that the player gets hit with is the product of the other players acceleration and mass

Force Mass Acceleration (N) (kg) (m/s/s) 10 2 20 4 5

What net force is needed to accelerate a 55 kg cart at 15 m/s2? Remember: Force = Mass  Acceleration Force = 55 kg  15 m/s2 Force = 825 Newtons

Force = Mass  Acceleration A 52 kg water-skier is being pulled by a speedboat. The force causes her to accelerate 2 m/s2. What is the net force that causes the acceleration? Force = Mass  Acceleration Force = 52 kg  2 m/s2 Force = 104 Newtons