Question
A hydraulic 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
of force.
To keep the car in position once it is lifted, the jack must produce
of force.
Answers
GPT-4o mini
To lift the car, the hydraulic jack must produce a force that is at least equal to the weight of the car, which is 9,800 N. Therefore:
To begin to lift the car, a hydraulic jack must produce **9,800 N** of force.
Once the car is lifted and to keep it in that position, the hydraulic jack must continue to exert a force equal to the weight of the car to counteract the force of gravity. Thus, it must also produce:
To keep the car in position once it is lifted, the jack must produce **9,800 N** of force.
In summary:
- To begin to lift the car: 9,800 N
- To keep the car in position: 9,800 N
To begin to lift the car, a hydraulic jack must produce **9,800 N** of force.
Once the car is lifted and to keep it in that position, the hydraulic jack must continue to exert a force equal to the weight of the car to counteract the force of gravity. Thus, it must also produce:
To keep the car in position once it is lifted, the jack must produce **9,800 N** of force.
In summary:
- To begin to lift the car: 9,800 N
- To keep the car in position: 9,800 N