First slide

Release from certain height

Question

From the top of tower, a stone is thrown up. It reaches the ground in $t_{1}$ second. A second stone thrown down with the same speed reaches the ground in $t_{2}$ second. A third stone released from rest reaches the ground in $t_{3}$ second. Then:

Moderate

A

$t_{3} = \frac{(t_{1} + t_{2})}{2}$
B

$t_{3} = \sqrt{t_{1} t_{2}}$
C

$\frac{1}{t_{3}} = \frac{1}{t_{1}} - \frac{1}{t_{2}}$
D

$t_{3}^{2} = t_{2}^{2} - t_{1}^{2}$

Solution

$- h = u t_{1} - \frac{1}{2} g {t_{1}}^{2} h = u t_{2} + \frac{1}{2} g {t_{2}}^{2} h = \frac{1}{2} g {t_{3}}^{2}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App