Part 2:
1.
(a) The vertical position of the ball increases at an increasing rate until it reaches the
peak, after which the vertical position decreases at an increasing rate.
(b) Yes, the vertical velocity changes throughout the toss because it goes from positive
velocity to negative velocity, resulting in zero velocity. The peak is where the ball
changes direction.
(c) The vertical acceleration is negative because the slope is decreasing (because it becomes
less positive) and velocity is decreasing.
(d) The ball is released from the thrower’s hands @ __ and the time just before the ball is
caught is @ ___ because the ball isn’t released and/or caught at t=0. At these points, the
slope is the steepest at these points.
(e) Yes, the ball was released at this point because it was the point where the rate of
displacement over time (velocity) was the highest/steepest.
(f) The horizontal position of the ball increases at
constant rate.
(g) No, the horizontal velocity does not change; it’s constant.
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 Spring '10
 FAJANS
 Physics, Derivative, Acceleration, Projectile Motion, Velocity, Probability theory, ball

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