a remote control model car moves along a straight track at constant velocity dur
ID: 1416704 • Letter: A
Question
a remote control model car moves along a straight track at constant velocity during a speed trial.
A series of reference marks are 1.0 meter apart along the track. A contest judge starts her stopwatch (which was previously set to 0.0 seconds) at the instant this model car passes the 2.0 meter mark. When the care passes the 8.0 meter mark the judge reads 3.2 seconds on her stopwatch.
A) What distance does the car travel between the two locations noted by the judge, to the nearest 0.1 meter?
B) What displacement does the car travel between the two locations noted by the judge, to the nearest 0.1 meter?
C) what time interval does the car take to travel between these two marked locations, to the nearest 0.1 meter?
D) What is the average velocity of the car between thee two marked locations, to the nearest 0.1 meter/second?
E) Wgat is the average speed of the car between the two marked locations to the nearest 0.1 meter/second?
Explanation / Answer
A)
distance = 8.0 - 2.0 = 6.0 m
B)
displacement = 8.0 - 2.0 = 6.0 m
c)
time taken = 3.2 - 0.0 = 3.2 sec
d)
average velocity = displacement / time = 6.0 /3.2 = 1.9
e)
average speed = distance/ time = 6.0 /3.2 = 1.9
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