404487
Description
Mind Map by Martha Edney, updated more than 1 year ago
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Created by Martha Edney
over 10 years ago
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Physics
- vectors and velocity
- some quantities are
vectors and include size
as well as direction
- speed=distance/time
- distance time graphs
- a small steady incline
means something is
accelerating
- a steep line upwards
means it something is
travelling at speed
- a horizontal line means
something is stationary
- a small steady incline
means something is
accelerating
- some quantities are
vectors and include size
as well as direction
- velocity and acceleration
- acceleration is a
change in
velocity
- slowing down is
also an acceleration
- acceleration=change in
velocity(m/s) / time taken(s)
- a=(v-u) / t
- a=acceleration
v=final velocity
u=initial velocity
t=time taken
- a=acceleration
v=final velocity
u=initial velocity
t=time taken
- a=(v-u) / t
- a velocity time graph
shows how the
velocity of an object
changes with time.
The distance can be
calculated from the
area under the line
- a sloping line means
the object is
accelerating, a straight
line means the object is
moving at a constant
velocity, a line going
downwards means the
object is slowing down,
the highest point is the
objects final velocity
- acceleration is a
change in
velocity
- resultant forces
- if there is more
than one force
on a object all
the forces can
be combined
into a resultant
force
- a force is a vector quantity, because it
has a direction as well as a size
- a free body diagram represents
the forces acting on an object
- the arrows represent the size of the force
- the arrows represent the size of the force
- action and reaction forces need 2 objects
- e.g kicking a ball
- the force from the foot on the ball is the action force.
- the ball exerts and equal opposite
reaction force on the foot
- the force from the foot on the ball is the action force.
- e.g kicking a ball
- measured in
newtons (N)
- if there is more
than one force
on a object all
the forces can
be combined
into a resultant
force
- forces and acceleration
- newtons second law
- if the forces on an object are unbalanced 2
things about an object can change. Its
speed or direction
- if the forces on an object are unbalanced 2
things about an object can change. Its
speed or direction
- force =mass x acceleration
- f=ma
- f=ma
- the greater the force,the greater the
acceleration for a constant mass
- the greater the mass , the smaller the
acceleration for a constant force
- 1kg=1000g
- accelertion =m/s*2
- mass=kg
- newtons second law
- terminal velocity
- weight =mass x gravitational field strength
- (N)=newtons
- (KG)=kilograms
- (N/KG) or (m/s*2)
- (N)=newtons
- earth =9.8 n/kg
moon=1.6 n/kg
jupiter=25.4 n/kg
- mass=the amount of matter in an object
- weight=the force of gravity on an object
- weight =mass x gravitational field strength
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