A particle is projected at an angle of60∘ above the horizontal with a speed of 10m/s .When the projectile reaches highest point, change in velocity is

A particle is projected at an angle of 60^(@) above the horizontal with a speed of 10m//s . After some time the direction of its velocity makes an angle of 30^(@) above the horizontal. The speed of the particle at this instant is s

A particle is projected at an angle 60^(@) with the horizontal with a speed 10m//s . Then, latus rectum is (Take g=10m//s^(2) )

A particle is projected with initial speed u at an angle theta above the horizontal . Let A be the point of projection , B the point where velocity makes an angle theta //2 above the horizontal and C the highest point of the trajectory . Radius of curvature of the trajectory at point A is

A particle is projected with initial speed u at an angle theta above the horizontal . Let A be the point of projection , B the point where velocity makes an angle theta //2 above the horizontal and C the highest point of the trajectory . Radius of curvature of the trajectory at point C is

A particle is projected with initial speed u at an angle theta above the horizontal . Let A be the point of projection , B the point where velocity makes an angle theta //2 above the horizontal and C the highest point of the trajectory . Radius of curvature of the trajectory at point B is

A particle is projected at an angle 60^@ with horizontal with a speed v = 20 m//s . Taking g = 10m//s^2 . Find the time after which the speed of the particle remains half of its initial speed.

A heavy particle is projected from a point on the horizontal at an angle 60^(@) with the horizontal with a speed of 10m//s . Then the radius of the curvature of its path at the instant of crossing the same horizontal is …………………….. .

A ball is projected at an angle 60^(@) with the horizontal with speed 30 m/s. What will be the speed of the ball when it makes an angle 45^(@) with the horizontal ?

A particle is projected with speed 'u' at an angle 60^@ with horizontal, then find the speed when its angle with horizontal changes to 30^@ .

A projectile is fired at an angle of 45^(@) with the horizontal. Elevation angle of the projection at its highest point as seen from the point of projection is