1. Physics 110G Gravity, Force and Space TOC 1 Tension The magnitude of the tension is the same everywhere in the rope.

2. Physics 110G Gravity, Force and Space TOC 2 Name of Force Symbol When does this force occur? Where does this force occur? Magnitude Direction Associated Energy Tension If an object that is experiencing the force is pulling but not stretching another object On the object that is experiencing the force at the point where the pulling occurs Determined using Newton’s Second Law Toward the center of the object being pulled (rope, wire, etc.) No associated energy

3. Physics 110G Gravity, Force and Space TOC 3 Spring Force

4. Physics 110G Gravity, Force and Space TOC 4 Name of Force Symbol When does this force occur? Where does this force occur? Magnitude Direction Associated Energy Spring Force On the object experiencing the force where it connects to the object that stretches/compresses Toward the center of the object that stretches or away from the center of the object that compresses Elastic Potential Energy If an object that is experiencing the force is stretching (or compressing) another object

5. Physics 110G Gravity, Force and Space TOC 5 Gravity

6. Physics 110G Gravity, Force and Space TOC 6 Name of Force Symbol When does this force occur? Where does this force occur? Magnitude Direction Associated Energy Gravity or At the center-of-mass of the object receiving the force or Toward the center of mass of the other massive object Gravitational Potential Energy If there are two massive objects present

7. Physics 110G Gravity, Force and Space TOC 7 Gravity (near the earth’s surface) m Mass of the earth6x10 24 kg Radius of the earth6.375x10 6 m

8. Physics 110G Gravity, Force and Space TOC 8 Normal Force m N m N w

9. Physics 110G Gravity, Force and Space TOC 9 Name of Force Symbol When does this force occur? Where does this force occur? Magnitude Direction Associated Energy Normal Force or If an object touches the surface of another object On the object receiving the force at the point(s) where it touches the surface Determined using Newton’s Second Law Perpendicular to the surface and from the object exerting the force to the object experiencing it No associated energy

10. Physics 110G Gravity, Force and Space TOC 10 Friction m N f Direction of motion or possible motion m N f

11. Physics 110G Gravity, Force and Space TOC 11 Name of Force Symbol When does this force occur? Where does this force occur? Magnitude Direction Associated Energy Friction or If an object touches the surface of another object On the object receiving the force at the point(s) where it touches the surface or In a direction that opposes the motion or the possibility of motion Thermal Energy

12. Physics 110G Gravity, Force and Space TOC 12 Drag D

13. Physics 110G Gravity, Force and Space TOC 13 Name of Force Symbol When does this force occur? Where does this force occur? Magnitude Direction Associated Energy Drag If an object is moving through a liquid or gas. On the object receiving the force at the point(s) where it touches the liquid or gas In a direction that opposes the motion Thermal Energy