Question
A rubber ball is dropped from a height of 2 metres. To
what height will it rise if there is no loss of energy/velocity after rebounding?Solution
The potential energy of a body when raised through height h is given by mgh. Each time, a normal rubber ball hits the floor, it loses one-fifth of its total energy and the rebound height is proportional to energy, so each bounce will rebound to four-fifth of the previous bounce.
Choose a figure which would most closely resemble the unfolded form of figure (Z).
Select a suitable figure from the Answer Figures that would replace the question mark (?) from question figure.
Which figure is different from the rest?
Three of the following four figure pairs are alike in a certain way and thus form a group. Which is the one that does not belong to that group?
<...How Many Triangles are there in the given figure?
Study the given pattern carefully and select the number that can replace the question mark (?) in it.
Select the figure that can replace the question mark (?) in the following series.
Option figures:
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