Question

A motorborat starting from rest on a lake accelerates in a starting line at a constant rate of 3m/s^2 for 8 second . how far dose the boat travels during this time ? ​

Answer 1

We know that s = ut + 1/2at²

According to question, u = 0 [As it was in rest]; a = 3ms⁻² ; t = 8s

s = 0 x 8 + 1/2 x 3 x 8 x 8

s = 3 x 4 x 8

s = 96m

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Answer 2

u = 0

a = 3m/s²

t = 8 sec

v = u + at

= 0 + 3*8

= 24

then,

v = 24

v² = u² + 2as

24² = 0 + 2* 3*s

576 = 6 * s

576/6 = s

96 m = s

so the answer is 96m