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  • A ball is thrown vertically upward with an initial velocity of <img alt="150 \mathrm{~m} / \mathrm{s}" src="https://entrancecorner.oncodecogs.com/gif.latex?150%20%5Cmathrm%7B%7Em%7D%20/%20%5Cmathrm

A ball is thrown vertically upward with an initial velocity of 150 \mathrm{~m} / \mathrm{s}. The ratio of velocity after 3 \mathrm{~s} and 5 \mathrm{~s} is \frac{x+1}{x}. The value of x is _____________.

\left\{\right.take, \left.\mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2\right\}

Option: 1

6


Option: 2

5


Option: 3

 -5


Option: 4

10


Answers (1)

best_answer

 

\begin{aligned} & \frac{V_1}{V_2}=\frac{u+a t_1}{u+a t_2} \\ & \frac{V_1}{V_2}=\frac{150-10 \times 3}{150-10 \times 5}=\frac{120}{100} \\ & \frac{V_1}{V_2}=\frac{6}{5} \\ & x+1=6 \\ & x=5 \end{aligned}

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