Puzzle Time

3. the quantity of matter which a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field.
4. an amount of space between two things or people.
5. downward movement under the force of gravity only.
7. a force that acts between moving surfaces
10. the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution.

1. the frictional force resists force that is applied to an object, and the object remains at rest until the force of static friction is overcome.
2. an influence tending to change the motion of a body or produce motion or stress in a stationary body. The magnitude of such an influence is often calculated by multiplying the mass of the body by its acceleration.
6. the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
8. a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
9. the longitudinal retarding force exerted by air or other fluid surrounding a moving object.