Answer:
D) Acceleration
Explanation:
All the balls are thrown straight up in air, so (if we neglect air resistance) there will be only one force acting on them: the force of gravity.
The force of gravity acting on each ball is given by
[tex]F=mg[/tex]
where
m is the mass of the ball
g is the acceleration due to gravity (9.8 m/s^2, downward)
Using Newton's second law, F=ma, where F is the net force acting on the ball, we can write:
[tex]mg=ma[/tex]
And by simplifying, we find that the acceleration of each ball is:
[tex]a=g[/tex]
and since g is a constant value, we conclude that the acceleration of each ball does not depend on the mass or the initial speed, so it is the same for each ball.
