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Question Number 73441 by Learner-123 last updated on 12/Nov/19

Answered by mr W last updated on 12/Nov/19

$$\frac{1+2}{1}={\left(\frac{7+d}{7}\right)}^2$$$$\Rightarrow d=7(\sqrt{3}-1)=5.12m$$$$$$$$v_{0}t=7$$$$1=\frac{1}{2}{gt}^2\Rightarrow t=\frac{1}{\sqrt{5}}$$$$v_0=7\sqrt{5}=15.65m/s$$

Commented by Learner-123 last updated on 12/Nov/19

$$howcomesthe{1}^{st}line?$$

Commented by mr W last updated on 12/Nov/19

Commented by mr W last updated on 12/Nov/19

$$parabola:$$$$y={Ax}^2$$$$y_1={Ax}_1^2$$$$y_2={Ax}_2^2$$$$\Rightarrow \frac{y_2}{y_1}={\left(\frac{x_2}{x_1}\right)}^2$$

Commented by Learner-123 last updated on 13/Nov/19

$$thankssir.$$

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