Which of the following is an example of chemical energy converted into mechanical energy? a. a windmill blades spinning
b. riding a bicycle

Which of the following represents an upside-down image?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

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