13.Oscillations
medium

સાદા લોલકને $P$ બિંદુથી મુકત કરતાં તેની $10\%$ ઊર્જા હવાના અવરોધમાં વપરાતી હોય,તો $Q$ બિંદુએ વેગ કેટલો.... $m/sec$ થાય?

A

$6$

B

$1$

C

$2$

D

$8$

Solution

(a) If $v$ is velocity of pendulum at $Q$ and $10\%$ energy is lost while moving from $P$ to $Q$

Hence, by applying conservation of between $P$ and $Q$

$\frac{1}{2}m{v^2} = 0.9\,(mgh)$

==>${v^2} = 2 \times 0.9 \times 10 \times 2$

==> $v = 6\,m/sec$

Standard 11
Physics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.