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SCIENCE REG.
Physics
Mechanics
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Created by
Olivia Li
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Cards (52)
Velocity
equation
v
= triangle
d/
triangle
t
Acceleration
equation
a =
triangle v
/
triangle
t
Force
equation
Fnet
=
ma
Pressure equation
P
=
F
/
A
(
Force
divided by
area
)
The
gravitational potential energy
equation
(
Triangle
)
Ep
=
mg
(
triangle
)
h
Kinetic energy equation
Ek =
1/2
*
m
*
v^2
Power equation
P
=
W
/t (
W
= the
energy changed
)
A
scaler
quantity has only a value (
magnitude
) associated with it.
A
vector
quantity has a value (
magnitude
) and
direction
associated to it.
Acceleration due to the force of gravity
:
g
=
g =
g
=
9.8
N
k
g
−
1
9.8Nkg^-1
9.8
N
k
g
−
1
Speed
is the
time rate
at which an object is moving along a path. It is a
scaler
quantity and speed is velocity without a direction.
Velocity
is the
rate
and
direction
of an object's
movement.
It is
vector
quantity and
velocity
is
direction
speed.
Distance is the
total length
or
ground covered
by an object.
Displacement
is the
change
in the
position
of the object
When interpreting graph use
words
and
calculations
The law of
conservation
states that
energy
cannot be created and
destroyed
it can only be
transferred
or
transformed
Law of acceleration: The second newton's law of motion is that the force applied on a n object is equal to the product of its mass and acceleration.
Law of intertia: inertiaThe first law of motion is an object that cannot start, stop or change direction by itself.
We need
calculation
evidence to prove that the object is
stationary.
a =
0
and (Triangle) v =
0
There is always a
connect
between
forces
and
motion
and we have to explain this.
Full explanation
when explain the net force
Stating
equations in each
explanation
Pressure
is a measure of
force
applied to a particular
area.
Pressure is increased by
increasing
the forec in the
same
area or
reducing
the area the
force
is applied to
Pressure is
proportional
to force
Pressure unit is
pascal
(
N/m^2
or
Nm^-2
)
Area unit is
m^2
The
different
position
of the
object
will
determine
the
pressure
applied
Gravitational potential energy is the
potential energy
an object has because of its
height.
The
higher
an object is
lifted
the
greater
the
gravitational potential energy.
E questions will always need to
state
the
law
of
conservation
An object has
kinetic energy
when it is
moving
More
mass greater kinetic energy
lower mass lower kinetic
energy
Friction is the
opposing force
to
kinetic energy
assuming
no energy
is
lost
, all
energy
will be
transferred
Work
is the
transformation
/transferred of energy. Which is the change in energy gain/ or loss of energy.
W =
F
* d (
Weight
moved,
distance
moved)
Easier
= Force is
smaller
You are
NOT
doing any
work
if the object is
NOT MOVING
(need to generate
displacement
)
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