Gujarati
Hindi
2.Motion in Straight Line
medium

A juggler maintains four ball in vertically upward motion. He attempts next ball after $1/4\, sec$. For the shows to go on, what should be the height for which he throws the ball ?.........$m$ $(g=10\,m/s^2)$

A

$5$

B

$2.5$

C

$1.25$

D

$1$

Solution

time $=\frac{1}{4}+\frac{1}{4}=\frac{1}{2} \sec$

$S=u t+\frac{1}{2} a t^{2}$

$S=\frac{1}{2} g t^{2}$

$S=\frac{1}{2} \times 10 \times\left(\frac{1}{2}\right)^{2}$

$S=\frac{1}{2} \times 10 \times \frac{1}{4}$

$=\frac{10}{8}$

$1.25 \mathrm{m}$

Standard 11
Physics

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