# PhysicsCh2

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1. Equation for Average Velocity
<V> = ΔX/Δt
2. Difference between speed and velocity
• Velocity is a vector; it has a magnitude and direction
• Speed is does not have a direction
• Velocity is a measureĀ of displacement/time
• Speed is a measure of distance/time
3. Equation for acceleration
• a = ΔV/Δt
• *must be instantaneous velocity
• *constant velocity means zero acceleration
4. Relationship between position, velocity, and time for one-dimentional motion
• x = x0+v0t+1/2at2
• v2-v02 = 2aΔx
• v = v0+at
5. Define acceleration, velocity, and deceleration
• Acceleration: How quickly the velocity changes
• Velocity: How quickly the position changes (net)
• Deceleration: Acceleration is in the opposite direction of velocity
6. If you throw a ball straight into the air...
How does acceleration apply?
How does velocity apply?
• Acceleration is g at EVERY POINT in the throw, even at the top.
• Velocity is equivalent at the same point (y) during the throw, but will have the opposite direction (opposite sign)
• Velocity at the top will be 0
 Author: victimsofadown ID: 203500 Card Set: PhysicsCh2 Updated: 2013-02-26 09:43:15 Tags: PhysicsCh2 Folders: Description: PhysicsCh2 Show Answers: