Question

HELP PLEASE

a person standing on the roof of a building throws a rubber ball down with a velocity of 8m/s

what is the acceleration(magnitude and direction) of the ball? does the ball slow down while falling? after 0.25 seconds how far has the ball fallen?

Answer 1

…..(When a person throws a ball from the top of a building, the ball with fall toward earth due to force of gravity. According to famous scientist Galileo's,all bodies falling toward earth with a constant acceleration of g=9.8m/s².so,if we ignore the air resistance,then the ball with fall freely with acceleration due to gravity “ g" . It's magnitude will be 9.8m/s². And it will be directed towards earth .)
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Answer 2

2.30625m

Step-by-step explanation:

The acceleration of the ball is the acceleration of gravity g.

By definition

g = constant = + 9.8 m?s^2 and is directed towards the centre of the earth

The ball does not slow down while falling

The position function is:

P(t) = 1/2 a t^2 + Vo t

In this specific case: P(t) = 4.9 t^2 + 8t

P(0.25s) = 4.9 (0.25)^2 + 8*0.25 = 2.30625m