motion an object is in motion when it changes it position relative to to reference point
TRANSCRIPT
MotionAn object is in motion when
it changes it position relative to to reference point.
2 Ways to Describe Motion
1) Speed
2) Velocity
SpeedThe distance an object travels in a givenamount of time.
100 meters
10 seconds
Calculating SpeedDistance
TimeSpeed =
measured in units of: meters per second (m/s)
s =dt
Showing Your WorkStep 1: Write down the formula.
s =dt
100 meters
10 seconds
Showing Your WorkStep 1: Write down the formula.
Step 2: List the parts of the formula and what they are worth from the problem.
s =dt
d =t =
100 meters
10 seconds
100 m10 s
Showing Your WorkStep 1: Write down the formula.Step 2: List the parts of the formula
and what they are worth from the problem.
Step 3: Rewrite the formula with the values.
s =dt
d = 100 mt = 10 s
100 meters
10 seconds
s =100 m10 s
Showing Your WorkStep 1: Write down the formula.Step 2: List the parts of the formula
and what they are worth from the problem.
Step 3: Rewrite the formula with the values.
Step 4: Crunch the numbers on a calculator.
Showing Your WorkStep 1: Write down the formula.Step 2: List the parts of the formula
and what they are worth from the problem.
Step 3: Rewrite the formula with the values.
Step 4: Crunch the numbers on a calculator.
Step 5: Write down the answer and include the units.
s =dt
d = 100 mt = 10 s
100 meters
10 seconds
s =100 m10 s
s = 10 m/s
Your final calculation should look like this:
s =dt
d = 100 mt = 10 s
s =100 m10 s
s = 10 m/s
s = 10 m/s
Grading Calculationss =
dt } 1 pt.
d = 100 mt = 10 s } 6 pts.
s =100 m10 s
} 5 pts.
} 3 pts.
15 pts. total
VelocitySpeed in a given direction.
100 meters
10 seconds
West
Calculating VelocityDistance
TimeVelocity =
measured in units of: meters per second (m/s)
v =dt
Difference Between Speed & Velocity
Speed Velocity
distance distance
time time
direction
Accelerationthe rate at which velocity changes
or
the change of velocity over time
10 m/s25 m/s
5 sec
Calculating Acceleration
acceleration = (final velocity – initial velocity)
time
measured in units of: meters/second/second (m/s2)
a = (vf - vi)t
Showing Your Work
a = (vf - vi)
tvf =vi =t =
a = (25m/s – 10 m/s)
5 sec
25 m/s
10 m/s5 sec
a = 3 m/s2
25 m/s 10 m/s5 sec