There is a small dog on a skateboard and a large elephant on another skateboard. Both are on level ground. You push each skateboard so that they will travel at the same speed.
Which of the following statements is true?
O It will take more force to move the dog because the dog has less mass than the elephant.
O It will take more force to move the elephant to the same speed because it has greater mass.
O It will take less force to move the elephant to the same speed because it has greater mass.
O It will take equal amounts of force to move them the same speed. Their mass does not matter.