Physics - Chapter 3

Chapter 3

Section 3-5 Projectile MotionChapter 2 - Motion in one direction X or YProjectile Motion - Motion in two directions X & Y

Examples - golf ball, thrown baseball, kicked football, speeding bullet, long jump

Air resistance - ignored in calculations, is often importantProblems deal with objects after they are moving freely in the air

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Demo - Projectiles - Predict result, why?

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Projectile Motion (cont.)

Galileo - Analyze horizontal and vertical motion separately

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Overheads - Projectile Motion velocity & acceleration 3-18, 3-20

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Y Direction (Y component)

Acceleration is constant a = g = -9.8 m/s2

Velocity changes with time due to g. If dropped v increases.

If projected at upward angle, v decreases and becomes negative.

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X Direction ( X component)

Acceleration is zero

Velocity remains constant, equal to initial value

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Galileo - An object projected horizontally will reach the ground in the same time as an object dropped vertically. The vertical motions are the same in both cases.

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3-6 Solving Problems Involving Projectile Motion

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Table 3-1 & 3-2 Equations

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Example 3-3 through 3-8

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Skip 3-7 & 3-8