second semester midterm vocab

Using a force to move an object a distance when both the force and the motion of the object are in the same direction.

the rate of doing work.

The principle stating that for every action there is an equal and opposite reaction.

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force.

An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction.

The force of gravity on the object and may be defined as the mass times the acceleration.

a force which tries to pull two objects toward each other.

a scalar quantity that refers to "how much ground an object has covered" during its motion.

a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.

an interval of time is the distance travelled by the object divided by the duration of the interval.

When the speed of an object is constantly changing, the instantaneous speed is the speed of an object at a particular moment in time.