Physics, 30.11.2019 00:31, gunnatvinson

What is the acceleration of a baseball when it is moving upward after being tossed directly upward?

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What is the acceleration of a baseball when it momentarily stops at its maximum height after being tossed directly upward?

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Physics, 11.09.2019 02:30, dasharia

For each of the motions described below, determine the algebraic sign (+, -, or 0) of the velocity and acceleration of the object at the time specified. for all of the motions, the positive y axis is upward. part a an elevator is moving downward when someone presses the emergency stop button. the elevator comes to rest a short time later. give the signs for the velocity and the acceleration of the elevator after the button has been pressed but before the elevator has stopped. enter the correct sign for the elevator's velocity and the correct sign for the elevator's acceleration, separated by a comma. for example, if you think that the velocity is positive and the acceleration is negative, then you would enter +,- . if you think that both are zero, then you would enter 0,0 . part b a child throws a baseball directly upward. what are the signs of the velocity and acceleration of the ball immediately after the ball leaves the child's hand? enter the correct sign for the baseball's velocity and the correct sign for the baseball's acceleration, separated by a comma. for example, if you think that the velocity is positive and the acceleration is negative, then you would enter +,- . if you think that both are zero, then you would enter 0,0 . part c a child throws a baseball directly upward. what are the signs of the velocity and acceleration of the ball at the very top of the ball's motion (i.e., the point of maximum height)? enter the correct sign for the baseball's velocity and the correct sign for the baseball's acceleration, separated by a comma. for example, if you think that the velocity is positive and the acceleration is negative, then you would enter +,- . if you think that both are zero, then you would enter 0,0 .

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Physics, 26.09.2019 01:30, BraedynM2089