Gravitational Field Introduction (8:12)
The gravitational field is introduced and illustrated. For a constant field and a nonconstant field around a spherical object. This is an AP Physics 1 topic.
Content Times: 0:01 The two force of gravity equations 0:55 The constant gravitational field equation 2:25 Gravitational Field Lines 3:16 What is a gravitational field? 4:33 The gravitational field equation around a spherical object 5:48 Drawing the field lines around a spherical object 7:02 Are gravitational field lines real? 

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