An object starting from rest travels 20m in first 2sec and 160m in next 4sec.what will be the velocity after 7sec from the start?
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Answered by
313
u = 0
s1 = 20 m
s2 = 160 m
t1 = 2 seconds
t2 = 4 seconds
s = 20+160= 180 m
t = 2+4 = 6 seconds
s = ut + 1/2at²
180 = 0×6 + 1/2×a×6²
180 = 18a
a = 180/18
= 10m/s²
t = 7 seconds
v = u + at
= 0 + 10×7
= 70 m/s
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s1 = 20 m
s2 = 160 m
t1 = 2 seconds
t2 = 4 seconds
s = 20+160= 180 m
t = 2+4 = 6 seconds
s = ut + 1/2at²
180 = 0×6 + 1/2×a×6²
180 = 18a
a = 180/18
= 10m/s²
t = 7 seconds
v = u + at
= 0 + 10×7
= 70 m/s
Hope it helps you ☺
Please mark as Brainliest ☺
Answered by
125
hope this will help you
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