Dynamics_HIbbeler_CH12_6

Dynamics_HIbbeler_CH12_6 - MOTION OF A PROJECTILE Todays...

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MOTION OF A PROJECTILE Today’s Objectives: Students will be able to: 1. Analyze the free-flight motion of a projectile. In-Class Activities: Check Homework Reading Quiz Applications Kinematic Equations for Projectile Motion Concept Quiz Group Problem Solving Attention Quiz
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READING QUIZ 1. The downward acceleration of an object in free-flight motion is A) zero. B) increasing with time. C) 9 . 81 m/s 2 . D) 9 . 81 ft/s 2 . 2. The horizontal component of velocity remains _________ during a free-flight motion. A) zero B) constant C) at 9 . 81 m/s 2 D) at 32 . 2 ft/s 2
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APPLICATIONS A good kicker instinctively knows at what angle, θ , and initial velocity, v A , he must kick the ball to make a field goal. For a given kick “strength”, at what angle should the ball be kicked to get the maximum distance?
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APPLICATIONS (continued) A basketball is shot at a certain angle. What parameters should the shooter consider in order for the basketball to pass through the basket? Distance, speed, the basket location, … anything else ?
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APPLICATIONS (continued) A firefighter needs to know the maximum height on the wall she can project water from the hose. What parameters would you program into a wrist computer to find the angle, θ , that she should use to hold the hose?
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MOTION OF A PROJECTILE (Section 12.6)
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Dynamics_HIbbeler_CH12_6 - MOTION OF A PROJECTILE Todays...

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