Which may affect the motion of an object?

A horizontal line is shown on a motion graph. What does this mean?

A force acts on an object in the opposite direction of another force of the same size. What will happen to the object?

An object falls through the air, but it still experiences friction. What type of friction does this object most likely experience?

What is best knows as the ability to "do work"?

A student wants to measure the distance of her classroom. What is the most appropriate scientific measurement for her to use?

If you rub your hands together, you may feel heat. Why is this true?