1.) Consider two bicycles, notably A and B, which start from the same point and
ID: 1873002 • Letter: 1
Question
1.) Consider two bicycles, notably A and B, which start from the same point and travel along the same straight line. Bicycle A travels for a time of 30.0 minutes (note: 60 seconds per minute) at a speed of 11.0 m/s. Bicycle B travels for a time of 30.0 minutes at a speed of 14.0 m/s. Determine the distance separating the two bicycles at the end of the 30.0 minute time period.
a.) 2500 m
b.) 3600 m
c.) 4800 m
d.) 5400 m
Answer __________
2.) Consider two bicycles, notably C and D, which start from the same point and travel along the same straight line. Bicycle C travels for the distance with a speed 5.00 m/s in a time of 30.0 seconds. Bicycle D travels the same distance in a time of 36.0 seconds. Determine the speed of Bicycle D.
a.) 3.18 m/s
b.) 2.74 m/s
c.) 4.17 m/s
d.) 5.96 m/s
Explanation / Answer
1)
v1 = 11.0 m/s
t1 = 30.0 min = 30.0*60 s = 1800 s
use:
d1 = v1*t1
= 11.0 m/s * 1800 s
= 19800 m
v2 = 14.0 m/s
t2 = 30.0 min = 30.0*60 s = 1800 s
use:
d2 = v2*t2
= 14.0 m/s * 1800 s
= 25200 m
distance between them = d2-d1
= 25200 m - 19800 m
= 5400 m
Answer: d
2)
v1 = 5.00 m/s
t1 = 30.0 s
use:
d1 = v1*t1
= 5.00 m/s * 30.0 s
= 150 m
same distance is travelled by D
so,
d2 = 150 m
t2 = 36.0 s
use:
v2 = d2/t2
= 150 m / 36.0 s
= 4.17 m/s
Answer: 4.17 m/s
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