The height and horizontal distances covered by a projectile in a time t are given by `y=(4t-5t^(2))`m and `x=3t`m the velocity of projection is
(A) `4ms^(-1)`(B) `3ms^(-1)` (C)`5ms^(-1)` (D) `10ms^(-1)`

The vertical height y and horizontal distance x of a projectile on a certain planet are given by x= (3t) m, y= (4t-6t^(2)) m where t is in seconds, Find the speed of projection (in m/s).

A body is projected horizontally from the top of the tower.It strikes the ground at an angle of 45^(0) after 5 Sec. The velocity of projection is (A) 19.6ms^(-1) (B) 39.2ms^(-1) (C) 49.0ms^(-1) (D) 29.4ms^(-1)

The horizontal and vertical distances travelled by a particle in time t are given by x=6t and y=8t-5t^(2) . If g= 10m//sec^(2) , then the initial velocity of the particle is

A ball is projected from the origin. The x- and y-coordinates of its displacement are given by x = 3t and y = 4t - 5t^2 . Find the velocity of projection ("in" ms^(-1)) .

The height y and distance x along the horizontal plane of a projectile on a certain planet are given by x = 6t m and y = (8t^(2) - 5t^(2))m . The velocity with which the projectile is projected is

The displacement of a body at any time t after starting is given by s=15t-0.4t^2 . Find the time when the velocity of the body will be 7ms^-1 .

The displacement of a body at any time t after starting is given by s=15t-0.4t^(2) . The velocity of the body will be 7ms^(-1) after time :

An aeroplane is moving horizontally at 30ms^(-1) at a height of 1km towards a target on the ground which is intended to be bombed The velocity with which bomb hits the target is (A) 100ms^(-1) (B) 200ms^(-1) (C) 144.6ms^(-1) (D) 150ms^(-1)

A steamer is moving due east with 36 km/h.To a man in the steamer the wind appears to blow at 18km/h due north.The speed of the wind is (A) 5sqrt(5)ms^(-1) (B) 5ms^(-1) (C) 5sqrt(2)ms^(-1) (D) 10ms^(-1)

The height y nad the distance x along the horizontal plane of a projectile on a certain planet (with no surrounding atmosphere) are given by y = (8t - 5t^2) m and x = 6t m , where t is in seconds. The velocity with which the projectile is projected at t = 0 is.