A particle moving with a uniform acceleration travels 24, m and 64, m in first two consec

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2.Motion in Straight Line

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A particle moving with a uniform acceleration travels $24\, m$ and $64\, m$ in the first two consecutive intervals of $4\, sec$ each. Its initial velocity is......$m / \sec $

A

$1$

B

$10$

C

$5$

D

$2$

Solution

$24=u(4)+\frac{1}{2} a(4)^{2}$ $…(1)$

$(24+64)=u(8)+\frac{1}{2} a(8)^{2}$ $…(2)$

$(1)$ $\times 4-(2), 8=8 u \Rightarrow u=1 \mathrm{m} / \mathrm{s}$

Standard 11

Physics

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