A body starts from rest and uniformly accelerated for 10 seconds to attain a velocity of 100m/s. It then maintains this speed for 10 more seconds. Its average velocity for this 20 seconds is: a, 100 m/s b, 150 m/s c, 80 m/s d, 75 m/s
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Answer:
v = u + a*t , u = 0 because it starts from rest
a = 100/10 = 10 m/s²
Distance is v² - u² = 2*10*s , u=0 , v=100
s = 100*100/2*10 = 500 m
Total distance is 500 + 100*10 = 1500 m
Average velocity is 1500/(10 + 10) = 1500/20 = 75 m/s
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Answer:
v = u + a*t , u = 0 because it starts from rest
a = 100/10 = 10 m/s²
Distance is v² - u² = 2*10*s , u=0 , v=100
s = 100*100/2*10 = 500 m
Total distance is 500 + 100*10 = 1500 m
Average velocity is 1500/(10 + 10) = 1500/20 = 75 m/s
HOPE IT HELPS YOU
PLEASE MARK ME AS THE BRAINLIEST
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