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Falling Objects Free Fall

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**Bell Work Write the following equation and solve for vf.**

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

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**Objectives: Describe Free Fall**

Calculate Displacement, velocity, and time in relation to a free falling object.

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

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**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

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**What happens if you throw an object upward?**

Acceleration is constant = m/s2 Velocity will change; there will be an instant where velocity is 0m/s

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**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.

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**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.

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**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

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

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

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© Houghton Mifflin Harcourt Publishing Company The student is expected to: Chapter 2 Section 1 Displacement and Velocity TEKS 4A generate and interpret.

© Houghton Mifflin Harcourt Publishing Company The student is expected to: Chapter 2 Section 1 Displacement and Velocity TEKS 4A generate and interpret.

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