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# Section 3.2 (Part 2) - Projectile Motion and Centripetal Force - PowerPoint PPT Presentation

Section 3.2 (Part 2) - Projectile Motion and Centripetal Force. Learning Goals. Explain why objects that are thrown will follow a curved path. Compare circular motion with motion in a straight line. Projectile Motion. Projectile – anything that is thrown or shot through the air

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## PowerPoint Slideshow about 'Section 3.2 (Part 2) - Projectile Motion and Centripetal Force' - danica

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### Section 3.2 (Part 2) - Projectile Motion and Centripetal Force

• Explain why objects that are thrown will follow a curved path.

• Compare circular motion with motion in a straight line.

• Projectile – anything that is thrown or shot through the air

• Thrown objects don’t always travel in straight lines – they curve downward.

• This is because the Earth’s gravity causes projectiles to follow a curved path.

• When you throw a ball, the force exerted by your hand pushes the ball forward.

• After you let go of the ball, no force is accelerating it forward.

• The horizontal velocity is constant (ignoring air resistance).

• After you let go of the ball, gravity pulls it downward.

• The ball has constant horizontal velocity but increasing vertical velocity.

• Gravity exerts an unbalanced force on the ball, changing its direction from only forward to forward and downward.

• Results in the curved path

• Horizontal and vertical motions are independent of one another

• If you throw a ball as hard as you can from shoulder height in a perfectly horizontal direction, would it take longer to reach the ground than if you dropped a ball from the same height?

• A thrown ball and dropped ball will hit the ground at the same time.

• Both balls travel the same vertical distance in the same amount of time.

• The thrown ball travels a greater horizontal distance.

Mythbusters – Will a fired bullet hit the ground at the same time as a dropped bullet?