AST101H1 Lecture Notes - Lecture 7: Angular Momentum, Afm Phase, Free Fall

• School: UTSG
• Department: Astronomy and Astrophysics
• Course: AST101H1
• Professor: Bryan Gaensler, C. Barth Netterfield, Ilana MacDonald

Document Summary

First law: a object in motion remains in motion unless acted upon by an outside force. Second law: acceleration is proportional to force and inversely proportional to mass. i. e. : a=f/m. Third law: for every force, there is always an equal and opposite reaction force. Ex: dancer skater spinning, moving her arms in moving faster than leaving them out. Note: when the distance is small the velocity is large. Velocity and distance changes, but not angular momentum. When the comet is closest to the sun. It is always the same, because angular momentum is conserved. When the comet is closet to the sun. When the force is the biggest or the mass. Ex: if you are falling for two seconds, the end of those two seconds, you going for 20 meters for 2 seconds. Only true if there is no air, true on the moon. Force of the wind equals the force of the gravity.