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. The winds blow parallel to the front. B. The front is between high and low pressure. C. The winds blow against each other and are of equal strength. D. The winds on both sides of the front are calm.
The largest Arab country in population is
A. Iraq B. Turkey C. Saudi Arabia D. Egypt
Human height and skin color are examples of
A) codominance. B) pleiotropy. C) incomplete dominance. D) polygenic traits.
When no visible radiation strikes the rods or cones in the human eye, a surface will appear ____
A) blue B) black C) white D) gray