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Weight - net gravitational force on an object
g = acceleration due to gravity
Apollo 11 astronaut Edwin Aldrin
stands near the leg of the lunar module on the Moon. Despite the fact
that the backpacks and astronauts only weighed 1/6 on their 350 pound
Earth weight, their center of gravity was shifted so they had to lean
slightly forward to balance. Footprints are clearly visible in the
foreground.
slope = g
Mass - amount of matter an object possesses
Weightless
The cartilage disks in their
spine
What is the relationship
Choice 1
1 kg ≈ 2.2 lbs
1 lbs ≈ 5 N
Average Senior Weighs
120 lbs ≈ 600 N
Finding acceleration
Ex) A satellite having a mass of 25. kg experiences a gravitational force of 200 N. Find the acceleration due to gravity at this location.
g = 200 N/25 kg
a = 8 m/s2
or 8 N/kg
Ex) A rocket weighs 18,000 N at the earth's surface. If the rocket rises to a height where its distance from the earth is 3 earth radii, its weight will be ...
When an object is on the
earth,
Distance from earth to rocket triples so, ....
....weight is 1/9 as great
w = 2000 N
(original weight, 18,000 N)
Galaxy Formation
NASA
Alexa Lolla - 2012
Enrichment
Einstein's Conception of Gravity The Elegant Universe - PBS
Mythbusters Moon Landing Hoax 4 HQ
©Tony
Mangiacapre., - All Rights Reserved
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