Projectile Motion.

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Introduction to Projectile Motion

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Presentation transcript:

Projectile Motion

Horizontal and Vertical Motion Position, velocity and acceleration are vectors. These vectors can be separated into components. Choose x for horizontal Choose y for vertical The equations for constant acceleration can be written separately in each coordinate.

Vector Gravity The gravitational acceleration is a vector. The magnitude is 9.8 m/s2. The direction is down. If there is only constant gravitational acceleration in the -y direction, the equations simplify for x.

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Vertical Pull All falling objects are subject to the same gravitational acceleration. The horizontal component doesn’t affect the downward acceleration. Pearson Education

Moving Target The initial horizontal velocity doesn’t matter. All objects fall at the same vertical rate (neglecting friction). At the collision the target fell a distance y = -d. The time it fell comes from the acceleration.

Horizontal Speed The point of collision measures the distance dropped since the ball was fired. The time determines the horizontal velocity of the ball. The angle of the launcher gives the total velocity.