Uh I think the sign would be positive because a negative times a negative is a positive. It is the same with a positive times a positive. But a positive times a negative would be a negative. This is because if its opposite signs then its a negative sign. If they are the same signs the sign is positive. Do you get what I am saying?
In a short paragraph, describe how you would determine the amount of work needed to pull a toboggan the length of a football field. Be sure to include the equipment list and describe the measurements that you will take.