Answer:
21.82 m/s
Explanation:
Given that :
Point OA:
Initial Velocity (u) = 0
Final velocity (v) = 30 m/s
Distance OA = 900m
Time taken to cover distance OA:
Using the motion equation:
Acceleration(a) :
(v - u)² / 2(s)
(30 - 0)² / 2*900
900 / 1800
= 0.5m/s²
From :
v = u + at
toa = (v - u) / a
(30 - 0) / 0.5
30/ 0.5 = 60 seconds
Time taken to cover OA = 60 seconds
Distance AB:
Distance traveled = 1500m
Velocity of travel = constant = 30m/s
Time taken = distance / velocity
Time taken = 1500 / 30
Time taken = 50 seconds
Hence, average velocity (Vob)
Total distance covered / total time taken
(900 + 1500)m / (60 + 50)s
2400 m / 110 s
= 21.818 m/s
= 21.82 m/s
