An object starting from rest travels 20m in first 2s and 160m in next 4s. What will be its velocity after 7s after its start?
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Let the acceleration be a
u = 0 (starting from rest)
s = ut + 1/2at^2
20 = 1/2 a 4
a = 10 m/s^2
v = u + at
v = 10 x 7
= 70 m/s (velocity after 7 seconds)
u = 0 (starting from rest)
s = ut + 1/2at^2
20 = 1/2 a 4
a = 10 m/s^2
v = u + at
v = 10 x 7
= 70 m/s (velocity after 7 seconds)
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