In class today Mr. Lane showed us a powerpoint on old and new terms. The things covered were distance, displacement, speed, the equation triangle, velocity, and acceleration.
Stuff to know
1. displacement only looks from beginning to end (Avg- average) Speed/velocity- avg V=d ---- t avg V= x (horizontal) ---- t avg V=y (vertical) --- t 2. X and Y are still distances but they tell us which direction. 3. Velocity can be negative or positive which is just saying that positive is the first direction, then the opposite of that direction is negative.
4. Average velocity: avg v= (V0+ Vf) --------- 2 (just like in math, the average velocity is all the velocities added together then divided by how many there are. 5. Acceleration: can only have acceleration if velocity changes. A= delta V ------ t D= 1/2 t+ 1/2 a t(squared) Delta: looks like a triangle, means "the change in" Vf-Vi ----- t
Vf= Vo+ at
Application: First equation:
A car is moving at 10m/s and 4 seconds later it is moving 30 m/s. What is its average acceleration in this 4 second time period?
1. Identify the concepts. acceleration (a) Time (t)
2. identify units. 10 m/s - Speed 4 seconds- Time 2 speeds! so one is initial and one is final 30 m/s- Speed
3. Identify all symbols. a t V0 VF
4. Identify the correct tool/equation A= Vf-Vo ------ t 5. Plug and chug
(figure out what to plug in and where
A= (30m/s-10m/s) -------------- 4s A=5 m/s
Second equation: A car traveled 100 meters in 5 seconds. Its final velocity was measured to be 25 m/s. What was its initial velocity in the 5 second time interval?
1. Identify the concepts. Velocity (Vf) Time (t) Velocity (Vi)
2. Identify the units 100 meters- distance 5 seconds-Time 25 m/s- Velocity final
3. Identify all symbols. V0 Vf t d
4. Identify the correct tool/equation D (Vf+V0) --= ------- t 2
I am married to Dr. Brandi Lane I have one sone R.J. and another son due in febrary. His name will be Elijah Craig Lane. i grew up in Clovis, CA. I went to high school in Girard, KS. I went to colege at Coe College in Cedar Rapids, IA. I have taught in Corcoran for six years.
In class today Mr. Lane showed us a powerpoint on old and new terms. The things covered were distance, displacement, speed, the equation triangle, velocity, and acceleration.
ReplyDeleteStuff to know
1. displacement only looks from beginning to end
(Avg- average)
Speed/velocity- avg V=d
----
t
avg V= x (horizontal)
----
t
avg V=y (vertical)
---
t
2. X and Y are still distances but they tell us which direction.
3. Velocity can be negative or positive which is just saying that positive is the first direction, then the opposite of that direction is negative.
4. Average velocity: avg v= (V0+ Vf)
---------
2
(just like in math, the average velocity is all the velocities added together then divided by how many there are.
5. Acceleration: can only have acceleration if velocity changes.
A= delta V
------
t
D= 1/2 t+ 1/2 a t(squared)
Delta: looks like a triangle, means "the change in"
Vf-Vi
-----
t
Vf= Vo+ at
Application:
First equation:
A car is moving at 10m/s and 4 seconds later it is moving 30 m/s. What is its average acceleration in this 4 second time period?
1. Identify the concepts.
acceleration (a)
Time (t)
2. identify units.
10 m/s - Speed
4 seconds- Time 2 speeds! so one is initial and one is final
30 m/s- Speed
3. Identify all symbols.
a
t
V0
VF
4. Identify the correct tool/equation
A= Vf-Vo
------
t
5. Plug and chug
(figure out what to plug in and where
A= (30m/s-10m/s)
--------------
4s
A=5 m/s
Second equation:
A car traveled 100 meters in 5 seconds. Its final velocity was measured to be 25 m/s. What was its initial velocity in the 5 second time interval?
1. Identify the concepts.
Velocity (Vf)
Time (t)
Velocity (Vi)
2. Identify the units
100 meters- distance
5 seconds-Time
25 m/s- Velocity final
3. Identify all symbols.
V0
Vf
t
d
4. Identify the correct tool/equation
D (Vf+V0)
--= -------
t 2
5. Plug in
100m (25m/s + ????)
-----= ------------
5s 2
V0= 15 m/s