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On Earth, under most circumstances, the acceleration due to gravity on an objet is constant. True False. A ball is tossed straight up in the air. Once the ball leaves your hand, when is acceleration negative? (Assume the origin is you). While the ball is moving upwards
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On Earth, under most circumstances, the acceleration due to gravity on an objet is constant. • True • False
A ball is tossed straight up in the air. Once the ball leaves your hand, when is acceleration negative? (Assume the origin is you) • While the ball is moving upwards • While the ball is moving downwards • Never during its journey • During its entire journey
A ball is dropped with no initial velocity. After t seconds, the ball has velocity v. What is the increase in the velocity of the ball from t seconds to 2t seconds? • v • 2v • v/2 • Not enough information
va/c = va/?+vr/c • a • b • c • r
Two objects traveling towards each other will have ______ relative velocities. • The same • Equal in magnitude and opposite in direction • Completely differing • Equal in direction and differing magnitude
Two objects traveling towards each other at 0.75c have relative velocities of magnitude 1.5c. • True • False