At peak height what is the objects velocity?
V= 0 m/s
What is the acceleration of an object? (kinematics)
- 9.8 m/s^2 (also gravity)
The vector component of horizontal velocity relates to which trig. function?
cosine
The vector component of vertical velocity relates to which trig. function?
sine
How does horizontal velocity change when an object is thrown or dropped?
Horizontal velocity stays the same the entire way
X vs T graph: What is the slope?
Velocity
X vs T graph: What does a steep slope indicate?
Fast Velocity
X vs T graph: What does a curve on the graph mean?
acceleration (positive or negative)
X vs T graph: What does a horizontal line mean?
...
X vs T graph : What does the area of this graph equal to ?
...
V vs T graph: What is the Area of this graph equal to ?
Displacement
V vs T graph: What is the Slope of this graph?
Acceleration
V vs T graph: What does a horizontal line mean?
Constant Velocity
A vs T: What is the Slope of this graph?
...
A vs T graph: What is a horizontal line ?
...
A vs T graph: What is the area under this graph?
...
What is N1L ?
objects maintain constant velocity unless a force acts upon it
What is N2L?
EF=ma
What is N3L?
every force has an equal and opposite force
What are the two equations for gravity ?
mg or Gm1m2/r^2
What is the equation for spring force?
kx
What is Normal force in an ideal situation?
weight or mg
What is normal force on an incline?
N= mgcosX
What is normal force on an elevator?
N=m(g+a) or N=m(g-a)
What is normal force when an object is being pushed up or down?
N=mg+FsinX
What is the equation for centripetal force?
EF=mv^2/r
What is the Velocity of an object in a circular motion?
v=(circumference) / (T)
Centripetal Motion: Forces pointed towards the center of the FBD are negative or positive?
Positive
Centripetal Motion: Forces pointed away from the center of the FBD are negative or positive?
Negative
What is the equation for Work?
W=fdcosx
What is work done by gravity ?
+mgh
What kind of work do forces do that are perpendicular to the direction of force make?
They don't do work
What is the area under a Force vs Direction graph?
work
What is total work?
The change in kinetic energy
What is the equation for potential energy of a spring?
(1/2)kx^2
What is the equation for kinetic energy?
(1/2)mv^2
What is the equation for momentum ?
p= mv
When is momentum conserved?
always
What is an elastic collision & its formula ?
When objects bounce off of each other & Mvi+mvi = Mvf+mvf
What is an inelastic collision & its formula?
when two objects stick together & Mvi+mvi = (M+m)vf
Is Kinetic Energy in an elastic collision conserved ?
yes
Is Kinetic Energy in an inelastic collision conserved?
no
Force vs Time graph: What is the area?
Impulse
Waves: What does a bigger amplitude result in?
louder noise
What is a high frequency the same as ?
A higher note
What happens to a wave if you increase the temperature?
Faster Waves
Do you add or subtract when dealing with constructive interference?
add
Do you add or subtract when dealing with destructive interference?
subtract
What is the speed of sound?
340 m/s
What is the equation for the frequency of a wave in an open tube ?
v/4L
What is the equation for the frequency of a wave in a closed tube ?
v/2L
What is Ohms Law Equation?
V=IR
What is resistance of a circuit in series?
R= R1+R2...
What is resistance of a circuit in parallel ?
1/R = 1/R1+1/R2...
What is the equation for current ?
I= Q/t
Equations for Electrical power?
P=IV, PI^2R, P=V^2/R
What is the current of a circuit in series?
The same throughout the circuit
What is the voltage of a circuit in series ?
It is added
What is the current of a circuit in parallel ?
Added
What is the voltage of a circuit in parallel?
The same