The final speed of ball after the collision is -8.50 m/s.
Given data:
The initial speed of ball is, u = 8.50 m/s.
Let m be the mass of ball. Then apply the conservation of linear momentum, which says that, "In a frame of reference, the momentum of an object before collision is equal to the momentum after collision". That is,
Momentum before collision = Momentum after collision
mu = m(-v)
here, v is the final speed of ball after the collision and negative sign shows that the ball will bounce back to opposite direction to its initial speed.
Solving as,
[tex]mu=-mv\\8.50 = -v\\v= -8.50 \;\rm m/s[/tex]
Thus, we can conclude that the final speed of ball after the collision is -8.50 m/s.
Learn more about the conservation of linear momentum here:
https://brainly.com/question/3920210
