You are standing in the yard with your big dog on a leash when another dog walks down your street.
Your dog wants to get to the other dog so he starts to pull on his leash with a force of 25 N. You can
only pull back with a force of 25 N. What will happen to you?
The forces are unbalanced so the dog will pull you forward.
The forces are balanced so you and the dog will not move.
The forces are unbalanced so the you will pull the dog backward.
