Questions and Answers
In projectile motion, the horizontal velocity is?
constant
In projectile motion, the vertical velocity is?
changing
In projectile motion, the only force acting on the object while it is in the air is the force due to gravity. So it only accelerates in the ______ direction at a rate of 9.8 m/s², downward.
vertical
For an object launched horizontally, the launch velocity and the range are ______ related.
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At what angle is the range of a projectile maximized?
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To hit a stationary target some distance away, you should aim (at / ______ / slightly below) the target.
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If a projectile is dropped from a plane, it will land (in front of / behind / ______) the plane if the plane is going a constant velocity.
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An object moving in uniform circular motion has a constant (______ / velocity).
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The speed is (______ / radially inward / radially outward) to the circular path.
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Circular motion does not have constant (speed / ______).
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In circular motion, the (magnitude / ______) is always changing.
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In circular motion there is not constant velocity.
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For an object moving in horizontal circular motion, the velocity vector and the centripetal acceleration vector are perpendicular to each other.
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What is the relationship between the speed of an object in horizontal circular motion and the centripetal force acting on the object?
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An object is moving in uniform circular motion. If the string holding it in the circular motion breaks, the object will fly off (______ / radially inward / radially outward) to the circular path at that point.
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Study Notes
Projectile Motion
- Horizontal velocity remains constant throughout projectile motion.
- Vertical velocity varies, influenced by gravity.
- The only force acting on a projectile in the air is gravity, causing vertical acceleration at 9.8 m/s² downwards.
- Launch velocity and range of horizontally launched objects are directly related.
- The optimal angle for maximum range of a projectile is 45 degrees.
- To successfully hit a stationary target, aim slightly above the target's position.
- A dropped projectile will land directly below a plane if the plane maintains constant velocity.
Circular Motion
- An object in uniform circular motion maintains constant speed.
- Speed is always tangent to the circular path traced by the moving object.
- Circular motion does not involve constant velocity due to continuous direction changes.
- The direction of an object's velocity vector in circular motion is always changing.
- There is an existence of acceleration in circular motion.
- The velocity vector and centripetal acceleration vector are perpendicular in horizontal circular motion.
- The relationship between the speed of an object in horizontal circular motion and the centripetal force is direct with the square of the speed.
- If the string holding an object in circular motion breaks, the object will move off tangent to the circular path.
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Description
Test your understanding of motion in two dimensions with these flashcards. Learn about key concepts like horizontal velocity, vertical velocity, and the effects of gravity on projectile motion. Perfect for physics students looking to reinforce their knowledge.
