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# 2-6 Projectile Motion

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• T 7
• ### 2-6 Projectile Motion

1. 1. 2-6: Projectile motion <ul><li>Recognize examples of projectile motion. </li></ul><ul><li>Describe the path of a projectile as a parabola. </li></ul><ul><li>Resolve vectors into their components and apply the kinematic equations to solve problems involving projectile motion. </li></ul>
2. 2. Projectiles <ul><li>All projectiles follow parabolic trajectories. </li></ul><ul><li>When you throw a football, it follows a parabola. </li></ul><ul><li>In this class, horizontal velocity will remain constant. </li></ul><ul><ul><li>In the real world, air resistance slows the velocity. </li></ul></ul><ul><ul><li>Air particles collide with object slowing the object. </li></ul></ul>
3. 3. <ul><li>Compare the two examples of free fall. </li></ul><ul><li>Components are independent of one another. </li></ul><ul><li>Analyze the motion each dimension separately. </li></ul>
4. 4. Formula for parabolic motion <ul><li>Remember analyze each dimension separately. </li></ul><ul><li>Remember the kinematic equations from Ch. 2. </li></ul>
5. 5. A movie director is shooting a scene that involves dropping a stunt dummy out of an airplane and into a swimming pool. The plane is 10.0 m above the ground, traveling at a velocity of 22.5 m/s in the positive x direction. The director wants to know where in the plane’s path the dummy should be dropped so that it will land in the pool.
6. 6. Projectiles launched at angles <ul><li>Still remember the kinematic equations. </li></ul>
7. 7. A zookeeper finds an escaped monkey hanging from a light pole. Aiming her tranquilizer gun at the monkey, the zookeeper kneels 10.0 m from the light pole. The monkey tries to trick the zookeeper by dropping a banana, then continues to hold onto the light pole. At the moment the monkey releases the banana, the zookeeper shoots. If the tranquilizer dart travels at 50.0 m/s, will the dart hit the monkey or the banana?
8. 8. 2-6: Summary <ul><li>Neglecting air resistance, a projectile has a constant horizontal velocity and constant downward free-fall acceleration. </li></ul><ul><li>In the absence of air resistance, projectiles follow a parabolic path. </li></ul>