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Kinematics

Mr. Kossman's Class

QuestionAnswer
What is the difference between distance and displacement? Distance is a scalar measuring how far something has travelled and does not include direction. Displacement is a vector measuring how far (in a straight line) something is from its start point. It does include direction.
What is the difference between speed and velocity? Speed is a scalar measuring how fast something is going. It does not include direction. Velocity is a vector measuring how fast something is going in a direction.
Is time a vector or scalar measurement? Time is a scalar as it will never have a direction.
Is acceleration a vector? Acceleration can be a vector or a scalar. It measures the rate either velocity or speed changes.
What does the length of a drawn vector represent? The length of a line of a drawn vectors represents its magnitude or size. A long line means a large vector. A short line means a small vector.
What does the arrow of a vector represent? The arrow of a drawn vector represents the direction of the vector.
When adding vectors how are they arranged? When adding vectors they need to be placed head to tail. This means the second vector is drawn off the first vector’s head. A resultant vector is then drawn from the start to the end.
When subtracting vectors how are they arranged? When subtracting vectors they need to be placed head to tail, but the second vector is changed 180 degrees. The resultant is drawn from the start to the end.
During projectile motion is there any point where the object experiences a vertical acceleration of 0? The vertical acceleration for a projectile is 9.81 m/s2 [down] at every point of its motion. The horizontal acceleration for a projectile is 0 m/s2 for all of its motion.
During projectile motion is there any point where the object experiences a vertical velocity of 0? Projectiles only experiences acceleration in the vertical direction. This means at the top of its flight its vertical velocity would be 0. As the object does not accelerate horizontally there will be no time its flight where the horizontal velocity is 0.
During projectile motion how does the time for an object to travel up and down compare to the time needed to travel out? The time it takes an object to travel up and down equals the time the object has to travel horizontally when moving as a projectile.
In Circular motion, how are centripetal and centrifugal acceleration the same? How are they different? They're similar as they both take place when an object is travelling in circular motion. Differences are Centripetal points towards the center and Centrifugal points away from the center. Centripetal: real, centrifugal acceleration: imaginary.
Created by: AlecHilchey
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