What do you need to know to establish motion

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

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Which of the following are guidelines to follow for obtaining accurate observations