Look for the stroller that is heavier.
A stroller holding a kid that weighs 28 pounds is heavier than a stroller holding a kid that weighs 22 pounds. So, the stroller holding the kid that weighs 28 pounds needs to be pushed with a larger force to start moving forward at the same speed as the other other stroller.
The mom and dad push the strollers at the same speed. Which stroller is pushed with a larger force?
A: a stroller with kid that weighs 22 pounds
B: a stroller with kid that weighs 28 pounds