-, or O) of the velocity and acceleration of the object at the time specified Fo

Question

-, or O) of the velocity and acceleration of the object at the time specified For each of the motions described below, determine For all of the motions, the positive y axis is upward the algebraic sign(+ Part A button. The elevator comes to rest a short time later Give the signs An elevator is moving downward when someone presses the emergency stop 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 veloci if you think that the velocity is positive and the acceleration is negative, then you would enter ,- If you think that both are zero ty and the correct sign for the elevator's acceleration, separated by a comma. For example, you would enter e,e. View Available Hint(s) Submit Lt

Explanation / Answer

-.a) as the elevator is moving downward before stop the direction of velocity is along negative y axis.

after button is pressed the velovity is decreasing that is negative acceleration

signs for velocity and accleration for elevator are ( - ,-)

b) as the ball leaves the childs hands the velocity is in the positive y axis . the acceleration due to gravity always acts on the ball .so signs of velocity and aceleration after leaving childs hand are ( +,-)

c) when the reaches top of projectile velocity is zero . but accelration due to gravity allways ats on the ball along the negative y axis. so signs of velocity and acceleration are (0,-).

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