1. Force and Motion

2. Force
Force is something that changes the movement or shape of an object—the greater the force, the greater the effect.

3. Force
Gravity:
the force of attraction between two objects with mass.

4. Force
Mass:
amount of material in an object.

5. Force
Weight:
force exerted on object’s mass by gravity.

6. Force
Friction:
is the force that slows down or stops the move­ment of one object in contact with another.
creates heat—the greater the friction, the greater the heat.
friction experienced by objects traveling through the air is called air resistance.

7. Force Centrifugal force:
causes an object traveling in a straight line to follow a curved path.
usually creates circular motions that move outward toward the center of rotation.

8. Force Centripetal force:
causes an object traveling in a straight line to follow a curved path.
usually creates circular motions that move inward toward the center of rotation.

9. Motion MOTION: is directly related to the influence of forces.
movement of objects have measurable and observable properties.

10. Motion
Inertia:
the tendency of objects to remain at rest or keep moving in a straight line until influenced by a force
the greater the mass, the greater the inertia.

11. You already have this Kinetic Energy
The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed.
KE = 1/2mv2

12. You already have this Potential Energy
The energy of a particle or system of particles derived from position, or condition, rather than motion
U = mgh, where U is the potential energy in joules; m, is mass in kilograms; g is the acceleration of free fall; and h is height in meters.

13. Motion
Momentum:
the tendency of moving objects to remain in motion until slowed or stopped by a force
the greater the mass and velocity, the greater the momentum.

14. Motion
Speed:
the magnitude of movement, independent of direction.

15. Motion
Velocity:
the speed in a particular direction.

16. Motion
Acceleration:
the measure of how quickly speed and/or velocity changes.

17. Motion Center of gravity:
the specific point at which an object’s mass appears to be concentrated.