Physics: What Do You Know?

An object has energy, but it does not have force.

Force and energy both have direction.

The beginning of motion is caused by _______________.

Forces that are applied to an object in the opposite direction _________________ one another.

When an object is moving at a constant speed there must be __________________.

Forces are useful to explain motion on a moment-to-moment basis; energy is especially useful for describing beginning-to-end changes.

Free body diagrams only show the forces ___________________.

For every force there is an equal and opposite force.

Speeding up is caused by the unbalanced forces acting __________________.

An object will continue to remain at rest or move at a constant speed in a straight line unless it is acted upon by unbalanced forces.

Dyanmic friction always acts on an object in the direction in which the object moves.