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Get out your reading guide but DO NOT turn it in. Go over reading guide Gravity Notes Weight and Mass Calculations Homework: Weight Worksheet. What is gravity?. Agenda. AQOD. Gravity. Gravity. What is it?. Gravity.

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get out your reading guide but do not turn it in
Get out your reading guide but DO NOT turn it in
  • Go over reading guide
  • Gravity Notes
  • Weight and Mass Calculations
  • Homework: Weight Worksheet
  • What is gravity?

Agenda

AQOD

gravity1
Gravity
  • What is it?
gravity2
Gravity
  • Gravity is the attractive force between any two objects that have mass.
  • depends on the masses of the objects and the distance between them.
  • Increases as mass increases or as the objects get closer.
gravity3
Gravity
  • depends on
  • the masses of the objects
  • the distance between them.
  • Increases as mass increases or as the objects get closer.
earth s gravitational acceleration
Earth’s gravitational acceleration
  • If you dropped a book and a piece of paper at the same time which would hit the ground first?
  • Take out air resistance. Now what?
acceleration on earth due to gravity
Acceleration on earth due to gravity
  • Force of gravity on a falling object can be calculated with 2nd law equation
  • Fg = weight = mg
  • g = 9.8 m/s2 (On earth)
  • What about on Jupiter?
mass vs weight
Mass vs Weight
  • The amount of matter an object contains
  • Will NOT change if you visit another planet
  • Measured in kg
  • Gravitational force exerted on an object
  • Will change if you visit another planet, because the acceleration due to gravity changes
  • Measured in N

MASS

WEIGHT

weightlessness free fall
Weightlessness & Free Fall
  • Parabolic Dive Video
weightlessness on the space shuttle
“Weightlessness” on the Space Shuttle…
  • Objects seem weightless (float around) on the space shuttle because they are in orbit with the space shuttle.
  • In other words, objects are in free fall…falling AROUND the Earth rather than downward toward it.
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