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TRANSCRIPT
Engineering Department Physics1/31/2018 1
PHYSICS
Nila Alia, M.Pd.Engineering DepartmentPoliteknik Negeri Malang
email: [email protected]
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At the end of the lesson, you will be able to:
1. Determine different of distance and diplacement
2. Define velocity
3. Define acceleration
4. Calculate distance, velocity, and acceleration
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Pre Test
A drone needs to reach 50 m/s to take off, if the drone’s accelerationIs 2,1 m/s2 , how many seconds does it take to reach take off speed?
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Description
Linear Motion is motion of an object along straight line path
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Symbols of Linear Motion
Vav = average velocityt = timeVo = initial velocityV = final velocitya = accelerations = distance covered
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Distance
distance = average velocity x time
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What is different of distance and Displacement???
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Different of distance and Displacement
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Different of distance and Displacement
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Example 1
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Correct Answer
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t
va
vo
+ or -
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How About
V ?? Vav ??&
Vertical??
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Example 2
A remote control car accelerates from rest across a parking lot at 1,5 m/s2 and it does so far 12 s. What distance did it travel during this time?
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Correct Answer for Example 2
s = 0 + ½ (1,5 m/s2 ) (12)2
s = (0,75 m/s2 ) (144)s2
s = 108 m
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Example 3
Andrew throws a ball vertically. He notices it reaches a maximum height of 10 meters. What was the initial velocity of the ball? (g=9,8m/s2 )
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Correct Answer for Example 3
0 m2/s2 = Vo2 + 2 (-9,8 m/s2)(10m)
0 m2/s2 = Vo2 - 196 m2/s2
Vo2 = 196 m2/s2
Vo = 14 m/s
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Post Test
A drone needs to reach 50 m/s to take off, if the drone’s accelerationIs 2,1 m/s2 , how many seconds does it take to reach take off speed?
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Correct Answer Pre-PostTest
V = Vo + a.t50 m/s = 0 + 2,1 m/s2.t50 m/s = 2,1 m/s2.tt = 50 m/s : 2,1 m/s2
t = 23,8 s
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CONCLUSION???
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To be Continue