PROJECTILES (2D) A projectile is any object that is in a state of freefall, or in other words an...
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Transcript of PROJECTILES (2D) A projectile is any object that is in a state of freefall, or in other words an...
![Page 1: PROJECTILES (2D) A projectile is any object that is in a state of freefall, or in other words an object that is only acted upon by the force of gravity.](https://reader035.fdocuments.in/reader035/viewer/2022070404/56649f385503460f94c5459a/html5/thumbnails/1.jpg)
PROJECTILES (2D)
A projectile is any object that is in a state of freefall, or in other words an object that is only acted upon by the
force of gravity (we are assuming no air resistance in this class!)
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EXAMPLES OF PROJECTILES
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PROJECTILE MOTION
What velocity will horizontally projectiles have?
What acceleration will projectiles have vertically? What will the velocity look like? Displacement?
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PROJECTILE MOTION
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PROJECTILE MOTION
Is the horizontal motion of the projectile constant?
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PROJECTILE MOTION
• Compare the horizontal motion of the gravity free path and the projectile motion.
• Compare the vertical motion and the projectile motion.
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EXAMPLE
A cannon is fired horizontally at 20 m/s. N what happens to its horizontal velocity and its vertical velocity?
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PROJECTILE EQUATIONS
• Vertical Equations• y = Voyt + 1/2gt2
• vf = voy + gt• vf
2 = voy2 + 2gy
• voy = v sin • Horizontal Equations• x = vxt • vx = v cos
• Notice the horizontal equation and there is no acceleration. Why?
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EXAMPLE OF A HORIZONTALLY
LAUNCHED PROJECTILE
• A cannon is fired horizontally at 20 m/s on a 10 m tall cliff. How long will the cannon ball be in the air? How far from the base of the cliff will the cannon ball fall?
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EXAMPLE PROBLEM
• An airplane is flying horizontally with a velocity of 250 m/s. If the pilot drops a water balloon out of the window and it lands a horizontal distance of 500m from the launch point. From what height was it dropped?
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LAB: HORIZONTAL PROJECTILE
• If I roll a ball off of a table horizontally what effects how long it will take to hit the ground?•How fast I roll it?•How high the ball is?
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PROJECTILE LAUNCHED AT AN ANGLE
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PROJECTILE LAUNCHED AT AN ANGLE FROM GROUND
LEVEL• A quarterback passes a football with a velocity of 17
m/s at an angle of 38 degrees with the ground. How high does the football go? How long is the football in the air? How far does the football travel?
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PROJECTILE AT AN ANGLE
• Zac be nimble, Zac be quick, Zac jumped over the candlestick with a velocity of 5 m/s at an angle of 30 degrees to the horizontal. Did Zac burn his feet on the .25 m-high candle? (Did Zac clear the candle, and by how much?)