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Laws of motion
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Khaya ngwenya
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Cards (35)
What does Newton's First Law state about an object's motion?
An object remains at
rest
or in
uniform motion
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What does the term "external force" refer to in Newton's First Law?
Any
force
that
influences
an
object's
motion
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What is the formula for Newton's Second Law?
F
=
ma
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What does the variable 'F' represent in the equation F = ma?
The
force
acting on an object
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How is force related to mass and acceleration according to Newton's Second Law?
Force
equals mass times acceleration
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What does Newton's Third Law state?
For every
action
, there is an equal and opposite
reaction
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What is meant by "equal and opposite reaction" in Newton's Third Law?
For every
force
, there is a
counterforce
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How do Newton's laws of motion relate to each other?
They describe different
aspects
of motion and
forces
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If a book is resting on a table, what external force is acting on it according to Newton's First Law?
The force of
gravity
pulling it down
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How would you demonstrate Newton's Third Law using a balloon?
By releasing air from a balloon, it moves in the
opposite direction
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What laws of motion are discussed in the video?
Newton's
first
and
second
laws
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What does Newton's first law state about resultant force?
A
resultant force
is
needed
to
change motion
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What happens to a stationary object if the resultant force is zero?
It
remains
stationary
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What happens to a moving object if the resultant force is zero?
It continues moving at the same
velocity
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What does Newton's second law state about non-zero resultant force?
It causes the object to
accelerate
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What does "non-zero" mean in the context of forces?
Anything
other
than
zero
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If a particle has unbalanced forces acting on it, what direction will it accelerate?
In the direction of the
resultant force
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What could happen if an object accelerates to the right?
It could start moving,
speed up
, or slow down
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How does acceleration relate to velocity?
Acceleration is the
change
in velocity over time
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Why does the moon accelerate even with constant speed in circular motion?
Its
direction
is constantly changing
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What force acts on the moon to keep it in orbit?
The
gravitational pull
of the
Earth
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What does the size of the resultant force relate to in Newton's second law?
It is directly proportional to the
acceleration
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What is the equation for Newton's second law?
F
=
F =
F
=
m
⋅
a
m \cdot a
m
⋅
a
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How do you calculate the resultant force if given two opposing forces?
Subtract the
smaller force
from the larger
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If a particle has a mass of 0.25 kg and a resultant force of 12 N, what is its acceleration?
48
m/s
2
48 \text{ m/s}^2
48
m/s
2
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What is inertia?
The tendency for motion to remain
unchanged
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How does inertia relate to Newton's first law?
It is essentially the same
principle
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How is inertial mass defined?
By dividing
force
by
acceleration
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What does a large mass indicate about an object's inertia?
It requires a large
force
to change velocity
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What happens to an object's motion if no resultant force acts on it?
It remains at
rest
or in motion
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What are the key concepts of Newton's first and second laws of motion?
First Law:
Resultant force
needed to change motion
Second Law: Non-zero resultant force causes
acceleration
Inertia
: Tendency to maintain current motion
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What are the effects of acceleration on an object's motion?
Starts moving if
stationary
Speeds up if moving in the same direction
Slows down if moving in the
opposite
direction
Changes direction without changing speed
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How does circular motion relate to acceleration?
Constant speed with changing direction
Acceleration occurs due to direction change
Gravitational force
acts perpendicular to motion
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What is the relationship between force, mass, and acceleration?
Resultant force
is
proportional
to acceleration
Equation
:
F
=
F =
F
=
m
⋅
a
m \cdot a
m
⋅
a
Larger force results in
larger
acceleration
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What is the significance of inertia in motion?
Objects at rest stay at rest
Objects in motion stay in motion
Inertia measures resistance to change in
velocity
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