A particle is projected from the ground at an angle with the horizontal with an initial speed . At what time after which velocity vector of projectile is perpendicular to the initial velocity? [in second] |

A particle is projected from the ground at an angle with the horizontal with an initial speed . At what time after which velocity vector of projectile is perpendicular to the initial velocity? [in second] |

1 Answer

5876 Votes

3537

**(4)**

Initial velocity

Velocity after time is

Since and are perpendicular to each other

Two particle and move with constant velocities and along two mutually perpendicular straight lines towards the intersection point . At moment , the particles were located at distances and from , respectively. Find the time when they are nearest and also this shortest distance (nearest integer) |

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