Motion & Related Concepts Flashcards
How far away is the light from the moon?
The sun?
Moon - 1 second
Sun - 8 minutes
In turn
The moon has more gravitational pull than the sun b/c it is so much closer regardless of the size of the sun
What is the Law of Gravity (Newton)
The more massive either or both bodies are, the greater the gravitational force between them
The further apart two bodies are, the lesser the gravitational force between them
What is motion?
When does displacement occur?
Change in position
Displacement occurs unless the object is moving in a vacuum (space)
** so air is displaced when we walk through it **
What is speed?
Speed = Distance
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Time
Ex. Mph
What is velocity?
How is represented?
Describes speed and direction
** velocity is often represented using a vector **
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What is acceleration?
Deceleration?
Acceleration is a Change in velocity
Deceleration goes the other direction
What is equilibrium?
State of rest or uniform motion in which there is no resultant force on a body
What is the 1st law of motion?
Who stated it?
Newton
Law of Inertia
- an object in motion (or at rest) stays in motion along a straight path (or at rest) unless acted upon by a net external force
What is 2nd law of motion? (Newton)
The Law of Acceleration
- force = mass x acceleration
What is the 3rd law of motion?
The Law of Reciprocal Actions
- for every action, there is an equal and opposite reaction
Explain gravity, magnetism, and friction & their relation to changing motion
- Gravity - equally sized objects will fall to the ground at the same rate. Same amount of gravity
- Magnetism - Northern Lights (charged particles are pulled toward the magnetic field caused by the outer core - liquid metal)
- Friction - rough ground or air
