sportie59
01.07.2020 •
Mathematics
ASAP please, will be marked as brainiest
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Ответ:
Given : graph describing the journey of a bus between two stops.
To find : acceleration in the first 20 s , the distance between two stops , k average speed of the bus
Solution:
From Graph
Time sec Velocity m/s
0 0
20 7
130 7
160 0
acceleration, in m/s in the first 20 s
= ( 7 - 0 ) / (20 - 0)
= 7/20
= 0.35 m/s²
Distance between two stops
= (1/2) (0 + 7) * (20 -0) + 7 * ( 130 - 20) + (1/2)(7 + 0)(160-130)
= 70 + 770 + 105
= 945 m
Average Speed = 945/160 = 5.9 m/s
Ответ: