AST101H1 Chapter Notes - Chapter 4.1-4.5: Orbital Speed, Conservation Law, Kinetic Energy
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AST101H1 Full Course Notes
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How far in a certain amount of time. If velocity is changing in speed / direction. Gravity accelerates all objects by the same amount regardless of their mass. Air resistance causes difference in motion (feather vs. rock) Only way to change momentum is to apply force. Bug and truck have same momentum, but truck has greater velocity because it has more mass --> greater impact. Combined effect of all individual forces on an object. Changing an object"s momentum means changing its velocity as long as its mass remains constant. Net force is greater than 0 causes an object to accelerate. Any object spinning / moving along a curved path. Can change, only when special type of force is applied. Force that a scale measures (mass and forces on mass) Falling without any resistance to slow you down creates weightlessness. In space: always in a state of constant free-fall. Objects in space are constantly falling - creates weightlessness.