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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 4 - Motion in 2 Dimension > A particle is projected from ground at some angle with the horizontal. Let P be the point at maximum height H. At what height above the point P should the particle be aimed to have equal to maximum height ?

A particle is projected from ground at some angle with the horizontal. Let P be the point at maximum height H. At what height above the point P should the particle be aimed to have equal to maximum height ?

A swimmer wishes to cross a 500 m river flowing at 5 km/h. His speed with respect to water is 3 km/h. The shortest possible time to cross the river is