Answer:

Explanation:
The initial velocity of the ball is
u = +25.9 m/s (towards the wall)
while the final velocity of the ball is
v = -21.3157 m/s (away from the wall)
The time taken for the change in velocity to occur is
t = 0.0133 s
The acceleration can be calculated as the change in velocity divided by the time taken:

Substituting the numbers, we find:

Answer:
william h. seward secured the purchase of alaska from:
Explanation:
Force = mass * acceleration
F = ma
F = (15)(12)
F = 180N