Cedrus, Pinus, and Sequoia are examples of Gymnosperms. Sequoia is also an Angiosperm. Wolffia and Eucalyptus are Angiosperms. Polytrichum and Sphagnum are Bryophytes. Polysiphonia is an algae. Equisetum and Adiantum are Pteridophytes. Ginkgo is a gymnosperm.
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :