A) 1m/s
B) 10m/s
C) 5 m/s
D) 2 m/s
Correct Answer: A
Solution :
\[s=ut+\frac{1}{2}a{{t}^{2}}\] for \[\varepsilon t\,t=4s,\] \[s=24m\] \[\therefore \] \[24=4u+\frac{1}{2}a{{(4)}^{2}}\] or \[8a+4u=24\] or \[2a+u=6\] ??(i) For \[t=8s,\] \[s=24+64=88m\] \[\therefore \] \[88=8u+\frac{1}{2}a{{(8)}^{2}}\] or \[32a+8u=88\] or \[4a+u=11\] ?..(ii) Solving Eqs. (i) and (ii), we get initial velocity \[u=1\text{ }m/s\].You need to login to perform this action.
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