Answer to Question #137806 in Physics for Gigma Hill

Question

One student throws the ball into the air while the other student measures the total time that the ball is in the air. The students use a meterstick to measure the release height of the ball. Which of the following equations should the students use to determine the speed at which the ball was released when thrown vertically upward into the air?

A. Use y final = y initial+ v initial *t + (1/2)*a*t^2 from the moment in time in which the ball was released to the moment in time in which the ball reaches its highest point.
B. v final^2 = v initial ^2 + 2a(

Answer 1

They should measure the elapsed time between the moment when the ball was released and the moment when the student who throwed catches it again. Then they can use the equation

$$v=gt/2$$

and leave the meter stick on the table.