Down
1.  A measure of the amount of force needed to move an object a certain distance. 
2.  Energy in the form of a push or a pull. 
3.  The tendency of an object to resist a change in motion. 
4.  A force that pulls objects towards each other. 
5.  The combination of all the forces acting on an object is the object's ____ force. 
6.  The force of attraction between magnetic objects. 
7.  If the distance between two objects is increased, the gravitational force between the objects will ____. 
8.  The unit of work in the metric system. 


Across
3.  If the total mass of two objects is increased, the gravitational force between the objects will ____. 
9.  All objects ____ towards Earth at a rate of 9.8 meters per second. 
10.  ____ is used when a force is applied. 
11.  A force that results when two things are touching each other. If one or more of the objects are in motion, this force tends to slow down the objects. 
12.  A unit that is a measure of force. 
13.  The ____ of an object does not change when gravitational force changes. 
14.  A measure of the force of gravity on an object. 
15.  If you know the force (F) needed to move an object a certain distance (d), the amount of work completed can be calculated if you ____ the two numbers (F and d). 
16.  A device used for measuring mass. 
17.  A force has both a magnitude, or size, as well as a ____. 
18.  A measurement of the motion of something. This is equal to the product of the moving object's mass times its velocity. 
19.  Weight is measured with a spring ____. 
