I can describe and predict the relationship between gravity and the motion of...

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In this lesson, students will look at how the forces of gravity affect the motion of objects. They will learn all about how objects fall and accelerate.

NGSS:

MS-PS2-2

MS-PS2-4

Students will be able to describe and predict the relationship between gravity and the motion of an object.

Students will review the concept of gravity. They will also discuss which object (baseball, tennis ball, feather) when dropped from the same height simultaneously will hit the ground first.

Talk to students about *velocity* and *acceleration*. Explain how the force of gravity causes objects to fall toward the ground at the same rate. Use the diagram in the lesson for a visual representation. Students will calculate the velocity of a golf ball in a practice problem.

Next, explain that air resistance is a force that opposes the motion of objects as they move through the air. The lesson will return to the feather from the introduction and why it hit the ground last.

Explain that terminal velocity is the maximum velocity that an object reaches when it is falling. Students will look at this concept with the example of parachutes.

Students will respond to ten multiple-choice and short-answer questions.

Students will recall what they learned in the lesson and complete an exit slip.

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