Jack tries to place magnets on the door of his refrigerator he observes that the magnets don’t stick he guesses that the door of the refrigerator is made of non-metallic substance what stage of scientific investigation does his guess represent

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change? work power gravitational energy chemical energy

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

In order to do work, the force vector must be question 1 options: in a different direction than the acceleration vector. in a different direction than the displacement vector. in the same direction as the displacement vector and the motion. in the same direction as the acceleration vector.