G. P.E. on Earth is determined by an object's and

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

True or false graphs must include scales that increase by the same amount

What does si stand for,when referring to a system of measurement