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Projectile Motion. What Is It?. Two dimensional motion resulting from a vertical acceleration due to gravity and a uniform horizontal velocity. Separate. Galileo determined that the vertical and horizontal components of the projectile motion can be analyzed separately
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What Is It? • Two dimensional motion resulting from a vertical acceleration due to gravity and a uniform horizontal velocity
Separate • Galileo determined that the vertical and horizontal components of the projectile motion can be analyzed separately • Acceleration due to gravity is the same regardless of vertical velocity • An object projected horizontally will reach the ground at the same time as one dropped straight down from the same height
Example 1 • A student driver on a motorcycle speeds horizontally off a 50.0m high cliff. How fast must the motorcycle leave the top if it is to land 90m from the base of the cliff?
Example 2 • A football is kicked at an angle of 37° with a velocity of 20m/s. Calculate a) the max height b) the time to hit the ground c) how far away it hits d) velocity at max height e) acceleration at max height
Example 3 • A boy on a small hill aims his water balloon slingshot horizontally, straight at a second boy hanging from a tree branch at a distance (d) away. At the instant the balloon is released, the second boy lets go and falls. Did the second boy avoid the hit?