Tossing Balls off a Cliff

# Tossing Balls off a Cliff - ANSWER Correct Part B Which...

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Tossing Balls off a Cliff Learning Goal: To clarify the distinction between speed and velocity, and to review qualitatively one- dimensional kinematics. A woman stands at the edge of a cliff, holding one ball in each hand. At time , she throws one ball straight up with speed and the other straight down, also with speed . For the following questions neglect air resistance. Pay particular attention to whether the answer involves "absolute" quantities that have only magnitude (e.g., speed) or quantities that can have either sign (e.g., velocity). Take upward to be the positive direction. Part A If the ball that is thrown downward has an acceleration of magnitude at the instant of its release (i.e., when there is no longer any force on the ball due to the woman's hand), what is the relationship between and , the magnitude of the acceleration of gravity?

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Unformatted text preview: ANSWER: Correct Part B Which ball has the greater acceleration at the instant of release? ANSWER: Correct Tossing Balls off a Cliff Part A Part C Which ball has the greater speed at the instant of release? Hint C.1 Consider the initial speeds Hint not displayed ANSWER: the ball thrown upward the ball thrown downward Neither; the speeds are the same. Correct Part D Which ball has the greater average speed during the 1-s interval after release (assuming neither hits the ground during that time)? Hint D.1 How to approach the problem Hint not displayed ANSWER: Correct Part E Which ball hits the ground with greater speed? Tossing Balls off a Cliff Part E ANSWER: the ball thrown upward the ball thrown downward Neither; the balls hit the ground with the same speed. Correct...
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Tossing Balls off a Cliff - ANSWER Correct Part B Which...

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