Ahydraulic jack is used to lift a car in order to change a tire. the car exerts a force of 9,800 n toward the ground due to the force of gravity. to begin to lift the car, a hydraulic jack must produce of force. to keep the car in position once it is lifted, the jack must produce of force.

To begin to lift the car, a hydraulic jack must produce more than 9,800N of force.

To keep the car in position once it is lifted, the jack must produce exactly 9,800N of force.

lexy is right because she has the labeled s

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.