The cyclist in the first 10 seconds. drove 50 m, in the next 20 s. 200 m and in the last 10 s. 150 m.
| February 4, 2021 | education
The cyclist in the first 10 seconds. drove 50 m, in the next 20 s. 200 m and in the last 10 s. 150 m. Find the average speed of the cyclist along the entire path
t1 = 10 s.
S1 = 50 m.
t2 = 20 s.
S2 = 200 m.
t3 = 10 s.
S3 = 150 m.
Vav -?
To find the average speed of a cyclist’s movement Vav, it is necessary to divide the entire path S traveled by him by the time of movement t: Vav = S / t.
The entire path of the cyclist S and the time of his movement will be the sum: S = S1 + S2 + S3, t = t1 + t2 + t3.
S = 50 m + 200 m + 150 m = 400 m.
t = 10 s + 20 s + 10 s = 40 s.
Vav = 400 m / 40 s = 10 m / s.
Answer: the average speed of a cyclist along the entire path is Vav = 10 m / s.
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