up 2 meters then to the left 3 meters Calculate its displacement 2 Liams plane stops from 250 mph in 25 seconds Calculate his planes acceleration Alexis swam 50 meters in 3 seconds then 47 meters in 2 seconds and finally 109 meters in 8 seconds Find her average speed ID: 784122
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Slide1
Q2:A spider is crawling on a wall. It goesup 2 meters, then to the left 3 meters, Calculate its displacement? 2. Liam’s plane stops from 250 mph in 25 seconds. Calculate his plane’s acceleration.Alexis swam 50 meters in 3 seconds, then 47 meters in 2 seconds, and finally 109 meters in 8 seconds. Find her average speed.
Slide2Today’s objective: I can calculate an objects motion relative to its surroundings.
Slide3Resultant Vector:The result of adding two vectors
A
B
C
+
Slide4A
B
C
+
Resultant Vector:
The result of adding
two vectors
Slide56 km+ 2 km + 6 km
With this information, can I determine the vector displacement?
Harley walked
then walked
and then
Slide66 km, N+ 2 km, N+ 6 km,E
Must have direction!!!
Slide7Relative Motion:Velocity changes depending upon different points due to different frames of reference
Slide8Frame of Reference:Needed to describe motionWhat you are comparing to
Slide9Relative Velocity: Overall velocity considering frames of reference
6 m/s + 1 m/s = 7 m/s
Slide10Relative Velocity: Walking toward back while train moves forward
4 m/s + 1 m/s = 3 m/s
Slide11Ashley and Cameron are moving 0 mph.
Train is moving 45 mph.
What is the train’s movement relative to
Ashley
&
Cameron?
45 Mph
Slide12Kristina is moving 0 mphDonna is moving 20 mph
What is
Donna’s
movement relative to
Kristina?
O + 20
= 20
Slide13Ryan
is walking 1 m/s
East in a train moving 4 m/s West. What is his velocity relative to an observer outside the train?
1+ 4 = 3
Slide14T-Bone SlimAlexander Supertramp
Find the T-Bone’s velocity relative to Alexander’s frame of reference.
1.2 m/s+ 15 m/s = 16.2 m/s
Slide15A river flows at a velocity of 3 km/h relative to the riverbank. Brandon’s boat moves upstream at a velocity of 15 km/h relative to the river. What is the velocity of his boat relative to the riverbank?12 km/h upstream
Slide16Bryan walked 1.5 km in 25 minutes. Realizing he was late, he ran the remaining 0.5 km in 5 minutes. Calculate his average speed.4.0 km/h
Slide17What is the average speed at 10:30?80 km/h
Slide18Which of these describes the displacement of a cyclist who travels 1 mile north then 1 mile east, and finally 1 mile south?3 miles east b. 1 mile northc. 3 miles south d. 1 mile east
Slide19Keosha is rushing to school at 65 mph. After 20 minutes she arrives at school. How far from the school does she live? S = 65 mph
T = 20 minD = ?
20
= .3
hr
60
S =
d
t
65 mph =
d
.3hr
.3
hr
x 65 mph =
d x .3
hr
.3hr
19.5 miles = d
Slide20How long will it take Garrett to drive to his grandmother’s house for Christmas if his average speed is 72 mph and she lives 183 miles away?S = 72 mph
T = ?D = 183
72 mph =
183mi
t
t
t
T 72 mph = 183 mi
72 mph = 72 mph
2.54 hours
Slide21Graph of acceleration:increasingconstantdecreasing
At any time is this object stopped? Explain.
Slide22Gravity: force between any two objects
Slide23Acceleration due to gravity: Same acceleration everywhere on Earth
Slide24Which will reach the ground sooner?
Slide25Gravity causes downward acceleration.Air resistance pushes in the direction opposite of the motion…so it pushes upward.
Slide26Acceleration due to gravity: Same acceleration everywhere on Earth
Slide27Gravity BalancedAcceleration = 0Constant Velocity
Slide28Gravitational Forcealways pulling toward the center of the EarthForce: measured in Newton's
Slide29Gravitational constants:Earth: 9.807 m/s/sMoon: 1.622 m/s/sMars: 3.711 m/s/sJupiter: 24.79 m/s/sSun: 274 m/s/s
Slide30Earth: 9.807 m/s/sMoon: 1.622 m/s/sMars: 3.711 m/s/sJupiter: 24.79 m/s/sSun: 274 m/s/s
Slide313) Eddie dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?
Slide323) Eddie dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?3) Eddie dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?3)
Eddie dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?
3)
Eddie
dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?
3)
Eddie
dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?
3)
Eddie
dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?
3)
Eddie
dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?
3)
Eddie
dropped a penny off the roof of a building. The penny hit the ground at a speed of 17.2 m/s. How long did it take to reach the ground?
Slide33Anthony hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon? S = 340 m/s
d
= X
t
= 6 s
Slide344) Anthony hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon? 4) Anthony hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon?
4) Anthony hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon?
4)
Anthony
hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon?
4)
Anthony
hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon?
4)
Anthony
hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon?
4)
Anthony
hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon?
4)
Anthony
hollered into a canyon and listened for its echo. The speed sound travels through air is 340 m/s. When his voice hit the bottom, it bounced back. The time it took for him to hear it was 6 seconds. How deep was the canyon?
Slide35Assignment Due Thursday:Speed and Motion Worksheet