ooOT-Mobile 9:01 PM session.masteringphysics.com Tossing Balls off a Cliff Maste
ID: 1651605 • Letter: O
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ooOT-Mobile 9:01 PM session.masteringphysics.com Tossing Balls off a Cliff MasteringPhysics 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 l(ltexttipft frm O)Kt 0]),she throws one ball straight up with speed (ltexttipfrm 0)K 0 and the other straight down, also with speed (ltexttipv lrm 0)HvO)). 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 l(Itexttipfa^a)) 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 (ltexttipfaKa)l) and (ltexttipig) g), the magnitude of the acceleration of gravity? Submit Give UpExplanation / Answer
A) as there is only gravitational force a=g
Second option is right.
B)at the instant if release, the ball which is thrown downwards will have higher acceleration because two forces are in same direction (force due to hand and gravitational force.) SECOND OPTION
C)It is given condition that both ball are thrown with same speed. Vo.LAST OPTION.
D)ball going downwards will have higher AVG. Velocity. It will have more displacement in given time.SECOND OPTION
E)both balls will hit the ground with same speed. Using energy conservation. Initial kinetic and potential energy are same for both balls and it will have same ke. And pe. Even on ground. LAST OPTION.
LET ME KNOW IF IT WAS HELPFUL. THANKS.
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