Newton’s 2 nd Law of Motion

Newton’s 2nd Law of Motion Define Newton’s second law of motion. Apply Newton’s second law of motion.

Newton’s 2nd Law of Motion • The acceleration of an object depends on the mass of the object and the net force exerted on the object. Under the same force, a heavy object will not accelerate as fast a light object. • The acceleration of an object is in the direction of the net force on the object. 2,000 kg .05 m/s/s ? N

Newton’s 2nd Law of Motion (cont.) • Sports Example: • When hitting a tennis ball, the force of the racquet swing causes the ball to accelerate in the direction of the swing force. • A heavier ball is slower than a lighter one.

Newton’s 2nd Law of Motion (cont.) Equation: Force = Mass x Acceleration (kg) (m/s2) SI Unit: Newtons (N) F = ma

Newton’s 2nd Law of Motion (cont.) • What is the net force on a dragster with a mass of 900 kg if its acceleration is 32.0 m/s2? f = m = a = F = ma

Newton’s 2nd Law of Motion (cont.) • What is the acceleration of an airplane that has the mass of 45,000 kg when an 180,000 N force is applied to it? f = m = a = F = ma

Newton’s 2nd Law of Motion (cont.) • A tugboat is helping a cargo ship into the dock. What is the cargo ship’s mass if the net force on the cargo ship is 6,000,000 N and it has an acceleration of 2.0 m/s2? f = m = a = F = ma

Newton’s 2 nd Law of Motion