Asked by Lola
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?
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.
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.
Answers
Answered by
Damon
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.
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.
Answered by
Lola
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.
Answered by
Damon
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
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
Answered by
Damon
v = Vi + a t
here
v = Vi - 9.81 t
here
v = Vi - 9.81 t
Answered by
Lola
Ok thank you.
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