Question

A rod of length 50 cm is pivoted at one end. It is raised such that if male an angle of 30 degrees from the horizontal as speed when it passes through the horizontal will be

Answer 1

Answer:

A rod of length 50cm is provided at one end. It is raised such that if makes an angle of 30^{\circ} from the horizontal as shown and released from rest. Its angular speed when it passes through the horizontal ( in rad s-1) will be (g = 10ms-2)

Option 1)\frac{\sqrt{20}}{3}Option 2)   \sqrt{\frac{30}{2}}Option 3)\sqrt{30}Option 4)\frac{\sqrt{30}}{2}

Explanation:

Answer 2

Answer:

Explanation:

By work energy theorum,

mgl/4=1/2×Iw²

mgl/4 =ml²w²/3×2

w²=√3g/2l=√30