Energy,Forces,Constant Velocity
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47 Terms
Eg formula
mgh
g=
10N/kg
Ek formula
(1/2)(m)(v)²
J=
Joules
Work
Energy that is added or taken away from the system
Work formula
F*change in position(displacement)
Ek
Kinetic energy
Eg
Gravitational potential energy
Eel
Elastic Potential Energy
Ediss
Dissipated energy(friction)
Kinetic energy
The energy of moving objects
Gravitational potential energy(Potential)
The energy of an object due to its position(height)
Potential energy…
has the potential to turn into kinetic energy
Eel
The energy of objects that are stretched or compressed and will return back to its original shape when the force is removed.
Ediss
A group of energies that build up and spread out throughout the system due to friction/drag or collisions.(Ediss never decreases once it shows up, it’ll either stay the same or increase)
Fw
Gravity
Ft
tension(Ropes)
Fd
Air resistance
Ff
Friction
Fn
Normal(supporting)
Fa
Applied(push or pull)
Newtons 3rd Law
For every force there is an equal and opposite force
Force pairs
They happen on different objects and are equal in magnitude in opposite directions.
Newtons 2nd Law
The acceleration of an object depends on both Net force and mass.
Net force
The sum of all forces acting on an object.
Net force has two parts:
Direction and Magnitude.
Formula for Net Force is…
Fnet=M*A
The formula for acceleration is…
A=Fnet/M
The formula for mass is…
M=Fnet/A
System schemas…
List all the objects in a system and represents their interactions.
formula for finding the velocity
change in position/change in time
displacement
change in position
formula for displacement
Xf-Xi
Xf
final position
Xi
initial(starting) position
To find velocity on a graph…
find the slope of the line.
Displacement is…
distance from the starting position
steeper line=
the faster the object is going
shallower line=
the slower the object is going.
on a motion map, going towards 0 means…
the object is going in the negative direction.
on a motion map, going away from 0 means…
the object is going in the positive direction.
the longer the arrows are on a motion map…
the faster the object is going.
the shorter the arrows are on a motion map…
the slower the object is going.
dots on a motion map=
time
on a velocity vs time graph, lines are…
horizontal
The further the line is from 0…
the faster it’s going.
A horizontal line along the x-axis means…
the object is stopped.