500
Ms. Hannah's car broke down. she tried pushing the car, but it wouldn't move. Her daughter got out of the car and helped her. Together they will able to push the car to the side. Why wasn't Ms. Hannah able to move the car by herself?
What is the car has a lot of mass. This means you need more force to move it. Together, Ms. Hannah and her daughter had more force and were able to move the car.