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Objective

Objective. SWBAT describe Newton’s second law of motion and use it to explain the movement of objects. Chart of the Day. Review: Vocabulary. Force: a push or a pull Net force: the sum of all forces acting on an object.

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Objective

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  1. Objective • SWBAT describe Newton’s second law of motion and use it to explain the movement of objects.

  2. Chart of the Day

  3. Review: Vocabulary • Force: a push or a pull • Net force: the sum of all forces acting on an object. • Balanced forces: forces that cancel each other out  objects do not accelerate • Unbalanced forces: forces that do not cancel each other out  object accelerates

  4. Review: Newton’s First Law of Motion • An object at rest will remain at rest unless acted upon by an outside force. • An object in motion will remain moving at the same speed unless acted upon by an outside force.

  5. How it relates to velocity-time graphs…

  6. Newton’s Second Law of Motion • When a force acts on an object, the object accelerates in the direction of the force.

  7. Newton’s Second Law of Motion (cont.)

  8. Check For Understanding • A box with a mass of 20 kg is pushed with an acceleration of 2 m/s2. The force acting on the box is… • 5 N • 10 N • 20 N • 40 N

  9. Check For Understanding • An object with a mass of 30 kg is moving at a constant speed of 10 m/s. What force is pushing the object? • v = constant at 10 m/s  acceleration = 0 m/s2 • m = 30 kg

  10. Check For Understanding • What will be the acceleration of an 8kg object when it is pushed with a force of 16 N? • 0.5 m/s2 • 128 m/s2 • 2 m/s2 • 4 m/s2

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