A stone is projected vertically upward and crosses the edge of a balcony with a speed of

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

A stone is projected vertically upward and crosses the edge of a balcony with a speed of 5 m s−15\,\text{m s}^{-1}. After reaching its highest point it returns and crosses the same balcony again. Neglecting air resistance, the magnitude of its speed during the downward crossing will be (a) 52 m s−15\sqrt{2}\,\text{m s}^{-1} (b) greater than 5 m s−15\,\text{m s}^{-1} (c) exactly 5 m s−15\,\text{m s}^{-1} (d) less than 5 m s−15\,\text{m s}^{-1} but non-zero

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