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Extra credit-read all about it!
Review a science times article for 2 pts. extra credit.
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A projectile fired from the equator, straight north, is also moving east at 1000 mi/hr.
Because the target is moving east slower, the projectile will land to the right of the target.
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Coriolis effect 800 mi/hr east 1000 mi/hr east If it takes the projectile 1 hr to reach its target, it will be 200 miles east of the target.
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Coriolis effect 800 mi/hr east 1000 mi/hr east A projectile crossing lines of latitude in the northern hemisphere, will land right of its target.
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Angular velocity is the rate at which an object rotates
is the symbol used for angular velocity
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Coriolis effect 1000 mi/hr east 800 mi/hr east A projectile crossing lines of latitude in the southern hemisphere will curve to its left.
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2 pts. Extra credit Fill the bath tube and let the water sit for 15 minutes. Put a floating object in the water and pull the plug.
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Will the projectile hit its target?
X 800 mi/hr 800 mi/hr Yes, if we have a flat earth. Which way does the water rotate?
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A little vector addition
Resultant path 200 mi/hr east Projectile fired north Actual path is to the right of the target.
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Centripetal force The door pushes the passenger toward the center. V V
Fc The door pushes the passenger toward the center.
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Centripetal acceleration
V ac R ac ac Acceleration toward the center of the circle. What two things effect the centripetal acceleration?
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Centripetal force V Fc R Force toward the center of the circle.
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Why did Batman shoot the cable at the light post?
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Centripetal force Force toward the center of the circle. V Fc
Batmobile R Force toward the center of the circle.
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Torque-the turning effect of a force
d pivot Torque is the product of the perpendicular component of the force and the distance to the pivot.
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Torque and force are not the same thing.
Say it with me!
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Moment of inertia d1 d2 M1 M2 Center of rotation
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Moment of inertia is an object’s resistance to a change in its angular velocity
Angular velocity is the rate at which an object is rotating.
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