<p>A pendulum bob has a speed of 3 m/s at its lowest position. The pendulum is 50 cm long. The speed of bob, when the length makes an angle of <span class="equation">\(60^0 \)</span>to the vertical will be (g = 10 <span class="equation">\(m/s^2\)</span>​​​​​​​) ____________ m/s.</p>