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2-D Projectile Motion

2-D Projectile Motion. Ball Drop Demo. Will the marbles hit at the same time? Why or why not? Will the marbles hit with the same velocity? Why or why not? Which marble is a projectile? Explain. Strobe of Falling Ball. The motion of a projectile does not depend on the motion

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2-D Projectile Motion

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  1. 2-D Projectile Motion

  2. Ball Drop Demo Will the marbles hit at the same time? Why or why not? Will the marbles hit with the same velocity? Why or why not? Which marble is a projectile? Explain.

  3. Strobe of Falling Ball

  4. The motion of a projectile does not depend on the motion • This means we treat the parts of a projectile’s motion

  5. Remember, is the only acting on a • Gravity always acts • There is force

  6. in the x direction ( dx ) is called the

  7. How to find the range • Find the it takes to hit the ground • Exactly the same as for straight and dy = vyit + ½at2 • What is the horizontal ? • The horizontal velocity is • dx = vxt (dx is in the x)

  8. Sample Problem • A cannonball is launched horizontally off a cliff with an initial velocity of 100 m/s. The cannonball takes 12 seconds to land. • How high is the cliff? • What is the vertical velocity of the cannonball when it hits the ground? • What is the horizontal velocity of the cannonball when it hits the ground? • What is the range of the cannonball?

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