Equations for uniform acceleration Where s is displacement m v is the final velocity m s 1 u is the initial velocity m s 1 a is the acceleration m s 2 ID: 612867
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Slide1
Equations of 1-D MotionSlide2
Equations for uniform acceleration
Where
s
is displacement (m)
v
is the final velocity (m s
-1
)
u
is the initial velocity (m s
-1
)
a
is the acceleration (m s
-2
)
t
is the time (s)Slide3
Equations of motion
When solving problems using these equations, it is important that you think about the problem, and try and visualise what is happening.
The following steps are advisable.
Step 1:
Draw a simple diagram of the situation
Step 2:
Neatly write down the information that has been given in the questions, using positive and negative values to indicate directions.
Convert all units to SI form
.
Step 3:
Select the equation that matches your data.
Step 4:
Use the appropriate number of significant figures in your answer.
Step 5:
Include units with the answer and specify a direction if the quantity is a vector.Slide4
Equations of motion
Example: A snowboarder in a race is travelling at 10 m s
-1
as he crosses the finishing line. He then decelerates uniformly until coming to rest over a distance of 20 m.
a. What is his acceleration as he pulls up?Slide5
Equations of motion
Example: A snowboarder in a race is travelling at 10 m s
-1
as he crosses the finishing line. He then decelerates uniformly until coming to rest over a distance of 20 m.
b. How long does he take to come to rest?Slide6
Equations of motion
Example: A snowboarder in a race is travelling at 10 m s
-1
as he crosses the finishing line. He then decelerates uniformly until coming to rest over a distance of 20 m.
c. Calculate the average speed of the snowboarder as he pulls up.Slide7
FIRST TEST:
NEXT TUESDAY DOUBLE
Topics Covered:
Units and Measurement
SI Units
Scientific Notation
Significant Digits
Motion in 1D
Distance Travelled & Displacement
Speed and Velocity
Acceleration
Graphs of 1D Motion (Position/Time, Velocity/Time)
Equations of Motion
FOR MORE DETAIL ABOUT WHAT YOU SHOULD KNOW FROM EACH TOPIC, REFER TO COURSE GUIDE WHICH WAS SENT ELECTRONICALLY VIA SCHOOL EMAIL.