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Falling Objects

Falling Objects. Free Fall. Bell Work. Page 13 of Scientific Notebook. Write the following equation and solve for v f . V f 2 = V i 2 + 2a ∆ y Write the following equation and solve for ∆t. V f = V i + a ∆t. Objectives:. Describe Free Fall

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Falling Objects

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  1. Falling Objects Free Fall

  2. Bell Work Page 13 of Scientific Notebook • Write the following equation and solve for vf. Vf2 = Vi2 + 2a ∆ y • Write the following equation and solve for ∆t. Vf = Vi + a ∆t

  3. Objectives: • Describe Free Fall • Calculate Displacement, velocity, and time in relation to a free falling object.

  4. What is free fall? The motion of a body when only the force due to gravity is acting on the body.

  5. What is acceleration due to gravity? • The constant acceleration of an object dropped near the surface of a planet. • Earth ag = - g = -9.81m/s2 ALSO KNOWN AS FREE FALL ACCELERATION

  6. What happens if you throw an object upward? • Acceleration is constant = - 9.81 m/s2 • Velocity will change; there will be an instant where velocity is 0m/s

  7. When an object is thrown upward, does it always have the same acceleration? • Yes, downward acceleration is the same when the object is moving up, when it is at rest at the top of its path, and when it is moving down.

  8. When a ball is thrown upward, what changes? • Position, magnitude, and direction of the velocity changes. 1) Object Moving Upward – Positive Velocity & Negative Acceleration. 2) Object At the Top of It’s Path – Velocity is zero & Negative Acceleration. 3) Object Moving Downward - Negative Velocity & Negative Acceleration.

  9. Guided Practice; Page 64; Practice F Page 14 of Scientific Notebook • A robot probe drops a camera off the rim of a 239 m high cliff on Mars, where the free-fall acceleration is -3.77m/s2. a. Find the Velocity with which the camera hits the ground. b. Find the time required for it to hit the ground. -1.42 m/s, 11s

  10. Independent Practice • Falling Objects: page 64; 3-4 • Engrade.com: Falling Objects Quiz • Extra Credit Problems: Engrade.com/Critical Thinking; 5 & 6

  11. Closure: • Describe today’s lesson in at least five sentences.

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