A ball has been thrown upward. Which of the following is true while the ball is on the way up, after the ball has been released, assuming no air resistance?

Question

a. The acceleration is upward.
b. The acceleration is zero.
c. The ball's speed increases by 9.81 m/s each second.
d. The ball's speed decreases by 9.81 m/s each second.

Answer 1

aaarrrggghhhh !!!!
g is g is g is g = -9.81 m/s^2

so
d

when you throw a ball up, its speed up decreases until it stops !

The acceleration is 9.81 down until it comes back down and hits the ground.

Answer 2

Isn't gravity going upward positive and if it's downward then it would be negative? That's what my teacher told me but I'm pretty sure he said the answer was D too.

Answer 3

our acceleration is 9.81 DOWN, negative
so our UP speed decreases

g = -9.81 m/s^2

gravity does not push UP no matter if you are going up or down

Answer 4

v = Vi + a t
here
v = Vi - 9.81 t

Answer 5

Ok thank you.