MCQ
A grasshopper can jump maximum distance $1.6\; m$. It negligible time of the ground. How far can it go in $10 \;s$?
- A$5\sqrt 2 \,m$
- B$10\sqrt 2 \,m$
- ✓$20\sqrt 2 \,m$
- D$40\sqrt 2 \,m$
${R_{\max }} = \frac{{{u^2}}}{g} = 1.6\,m$
$\Rightarrow \,u = 4\,m/s$
$u\cos \theta = 4\cos 45$ $ = 2\sqrt {2\,} \,m/s$
$S = u\cos \theta \times t$
$\therefore S = 2\sqrt 2 \times 10$
$\therefore S = 20\sqrt 2 \,m$
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