Which ramp requires the least amount of force? A man pushes a ball on a ramp with an arrow after the ball pointing up the ramp. The ramp is labeled with length 2 feet and height 1 foot. A man pushes a ball on a ramp with an arrow after the ball pointing up the ramp. The ramp is labeled with length 3 feet and height 1 foot. A man pushes a ball on a ramp with an arrow after the ball pointing up the ramp. The ramp is labeled with length 4 feet and height 1 foot.