2.2b Mass and Weight Flashcards
Mass SI unit
kg
Mass defn
the amount of matter in an object
Mass variable
m
Weight SI unit
N
Weight English unit
lbs
Weight defn
the force of gravity
Weight variable
Fg or sometimes W
Weight fundamental SI units
kg•m/s2
Conversion of pounds to kg
1kg = 2.20462 lbs
The conversion of pounds to kg only works…
on Earth at sea level
As an object moves from the surface of the Earth to outer space, its mass…
RTS
As an object moves from the surface of the Earth to the Moon, its mass…
RTS
As an object moves from outer space to the Moon, its mass…
RTS
As an object moves from the surface of the Earth to outer space, its weight…
decreases to zero
As an object moves from the surface of the Earth to the Moon, its weight…
decreases to 0 then increases to 1/6 as much as on Earth
As an object moves from outer space to the Moon, its weight
increases from 0 to 1/6 of that on Earth
If someone went halfway to the center of the Earth their mass would…
RTS
If someone went halfway to the center of the Earth their weight would…
increase 4X
if someone went up to a height equal to 2x the Earth’s radius, their weight would
decrease to 1/4x
The formula for calculating weight is…
Fg = mg
in Fg = mg, Fg stands for
The force of gravity/weight
in Fg = mg, m stands for
mass
in Fg = mg, g stands for
the acceleration caused by gravity
in Fg = mg, Fg units are
N
in Fg = mg, m units are
kg
in Fg = g, g units are
m/s2
The value of g at the Earth’s surface is
9.80665 m/s2
The value of g on the Moon’s surface is
1.6252 m/s2
On an Fg (y-axis) vs m (x-axis) graph, the gradient is = to what quantity?
g
