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Physics
Energy
GPE and gravity
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Created by
Chloe Smith
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Cards (22)
What is the focus of today's video?
Weight
and
gravitational potential energy
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How can gravity be defined?
As a
force
of
attraction
between two objects
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What factors determine the size of the gravitational force?
The
mass
of the objects and their
distance
apart
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Why is the gravitational force of small objects negligible?
Because they have relatively low
masses
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How does distance affect gravitational force for large objects?
Gravitational force
decreases
with
increased
distance
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What is the gravitational field around an object called?
Gravitational
field
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What symbol represents gravitational field strength?
The letter
g
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What is the gravitational field strength on Earth?
Approximately
9.8
newtons
per
kilo
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What is the gravitational field strength on the Moon?
Approximately 1.6
newtons
per kilo
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What does an object experience when it enters a gravitational field?
A
force of attraction
towards the center
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How is weight defined in physics?
As the force of
attraction
on an object
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How do you calculate an object's weight?
Mass
multiplied by
gravitational field strength
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What is the weight of a 60 kg person on Earth?
588 newtons
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Why do we often say we weigh 60 kilos instead of having a mass of 60 kilos?
Because
weight
and mass are different concepts
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What is the intrinsic property of an object?
Mass
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What is required to lift an object against gravity?
Energy
or
work
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What is the formula for gravitational potential energy?
ep
=
mgh
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What units are used for gravitational potential energy?
Joules
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How do you convert grams to kilos?
Divide by
1000
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What is the gravitational potential energy of a 100 g apple thrown 3 m up?
2.94
joules
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What are the key takeaways about gravity, weight, and gravitational potential energy?
Gravity is a force of attraction.
Weight = mass ×
gravitational field strength
(
9.8 N/kg
on Earth).
Gravitational potential energy (ep) = mass × gravitational field strength × height.
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What should you do if you enjoyed the video?
Like
and subscribe
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