A pendulum bob has a speed 3m/s while passing through its lowest position, length of the pendulum is 0.5 m then its speed when it makes an angle of 60° with the vertical is :

Question

A pendulum bob has a speed 3m/s while passing through its lowest position, length of the pendulum is 0.5 m then its speed when it makes an angle of 60° with the vertical is : (A) 2m/s (B) 1m/s (C) 4m/s (D) 3m/s

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/p-q5hbcvk1k0r7lccz.jpg" /> height attained =ℓ (.1-cosq.) u2=√v2 - 2 g ℓ (. 1 - cosq .)

Q. A pendulum bob has a speed $3 m / s$ while passing through its lowest position, length of the pendulum is $0.5$ $m$ then its speed when it makes an angle of $6 0^{\circ}$ with the vertical is :

$2 m / s$

$1 m / s$

$4 m / s$

$3 m / s$

height attained $= ℓ (1 - cos q)$
$u^{2} = v^{2} - 2 g ℓ (1 - cos q)$

Q. A pendulum bob has a speed 3m/s while passing through its lowest position, length of the pendulum is 0.5 m then its speed when it makes an angle of 60∘ with the vertical is :

2m/s

1m/s

4m/s

3m/s