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year 8
year 8 science: forces
newton's third law
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chiamaka ๐
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Cards (14)
How is Newton's third law often phrased?
For every
action
, there's an equal and opposite
reaction
.
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What does the equal sign in Newton's third law indicate?
It indicates that the
forces
are equal in
magnitude
.
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What does the negative sign in Newton's third law signify?
It signifies that the forces are in
opposite directions
.
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Why can't forces in Newton's third law cancel each other out?
Because they are exerted on different
objects
.
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If object A exerts a force on object B, what can be said about the force exerted by object B on object A?
It is equal in
magnitude
and opposite in
direction
.
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What are Newton's third law partner forces also known as?
Force pairs
.
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How do the magnitudes of forces exerted by different sized objects compare according to Newton's third law?
They are equal in magnitude
regardless
of size differences.
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What happens to the acceleration of an object if the forces acting on it are equal?
The object does not accelerate if the
net force
is zero.
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Why might someone think there is a delay in the creation of the partner force in Newton's third law?
They might believe that exerting a force quickly can catch the
universe
off guard.
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What is true about the forces in Newton's third law?
They are
equal
and
opposite
at every moment in time.
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What happens when a person exerts a force on a wall?
The wall exerts an
equal
and
opposite
force back on the person.
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How can one identify third law partner forces?
By listing both objects and reversing the
labels
of the forces.
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What are the key points of Newton's third law?
For every
action
, there is an
equal
and
opposite
reaction
.
Forces act on different objects.
Forces are equal in
magnitude
but opposite in
direction
.
Forces cannot
cancel
each other out.
Partner
forces
are always equal and opposite.
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What are common misconceptions about Newton's third law?
Forces can cancel each other out.
Equal
forces
result in equal
acceleration
.
There is a delay in the creation of
partner forces
.
Forces are
unequal
if one object is larger.
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