Distinguish between velocity and acceleration, and apply each to a ball tossed straight upward
What will be an ideal response?
Velocity has to do with how fast a body travels; acceleration has to do with how quickly a body changes velocity. An upward thrown ball has an initial velocity that decreases with time. This rate of decrease is the acceleration, g, which remains the same during the time the ball is in the air. When the ball gets to the top its velocity is instantaneously zero but its acceleration is still g. As the ball returns, its velocity picks up at the same rate it decreased while ascending (barring air drag). So during the ball toss, velocity changes with time while acceleration doesn't.
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A) blue B) black C) white D) gray
Which of the following statements explains why a stationary front does not move?
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A. Iraq B. Turkey C. Saudi Arabia D. Egypt
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