A child throws a ball so as to clear a wall of heigh than data distance x from it. Find the minimum speed required for clearing the wall.

A source emitting sound of frequency 180 Hz is alced in front of a wall at a distance of 2 m from it. A detector is also placed in front of the weal at the same distance from it. Find the minimum distance between the source and the detector for which the detector detects a maximum of sound. Speed of sound in air =360ms^-1 .

A ball is thrown from ground level so as to just clear a wall 4 m high at a distance of 4 m and fall at a distance of 14 m from the wall. Find the magnitude and direction of the velocity of the ball.

A ball is thrown from ground level so as to just clear a wall 4m high at a distance of 4 m and falls at a distance of 14 m from the wall. Find the magnitude and direction of the initial velocity.

A soure of sound of frequency 165 hz is placed in front of a wall at a distance 2 m from it. A dtector is also placed in front of the wall at the same distance from it. Find the minimum distance between the source and detector for which maximum sound is recorded int he detector . the speed of sound is 330 m/s

A source emitting sound of frequency 180 Hz is placed in front of a wall at distance of 2 m from it . A detector is also placed in front of the wall at the same distance from it. From the minimum distance between the source and the detector for which the detector detects a maximum of sound. Speed of sound in air = 360 m//s .

A particle is projected with a velocity u from a point at ground level. Show that it cannot clear a wall of height h at a distance x from the point of projection if u^2 lt g(h+sqrt(h^2+x^2)) .

A ball is thrown from the ground so as to just clear a wall 10 m high at a distance of 20 m and falls at a distance of 40 m from the wall. The magnitude and direction of the projection velocity is

A man is standing at distance x from a plane mirror in front of him. He wants to see the entire wall in mirror which is at distance. y behind the man. Find the minimum size of the mirror required.