A particle is projected from the ground at an angle of ${60^0}$ with horizontal with speed $u = 20{\rm{\;m}}{{\rm{s}}^{ - 1}}$. The radius of curvature of the path of the particle, when its velocity makes an angle of ${30^0}$ with horizontal is $\left( {{\rm{g\;}} = 10{\rm{\;m}}{{\rm{s}}^{ - 2}}} \right)$

A ball is projected from ground at angle $heta$ with the horizontal. After t=1s, it is moving at ${45^0}$ with the horizontal and after t=2second, it is moving horizontally. What is speed of projection of ball ? $\left[ {g = 10{\rm{ }}m{s^{ - 2}}} \right]$

The maximum horizontal range of a projectile is 400 m. The maximum value of the height attained by it will be

A ball is thrown at $280 \ m s^{-1}$ at an angle of $30^\circ$ to the horizontal. How high does the ball go? (Use $g = 9.8 \ m s^{-2}$)

A boy playing on the roof of a 10 m high building throws a ball with a speed of $10\;{\rm{m}}{{\rm{s}}^{ - 1}}$ at an angle of ${30^0}$ with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground? (g = 10{\rm{\;m}}{{\rm{s}}^{ - 2}},\sin 30^\circ  = 1/2,{\rm{\;cos\;}}30^\circ  = \sqrt 3 /2)

Two projectiles A and B are projected with the same speed at angles 30° and 60° with the horizontal respectively. Which one will have a greater range?

A stone is projected from the ground with velocity $50{\rm{\;m}}{{\rm{s}}^{ - 1}}$ and angle of ${30^0}$. It crosses a wall after 3 s. How far beyond the wall the stone will strike the ground?

Two bodies are projected from the same point with equal speeds in such directions that they both strike the same point on a plane whose inclination is $\beta$. If $\alpha$ be the angle of projection of the first body with the horizontal the ratio of their times of flight is

A particle is projected from the ground at an angle of ${60^0}$ with horizontal with speed $u = 20{\rm{\;m}}{{\rm{s}}^{ - 1}}$. The radius of curvature of the path of the particle, when its velocity makes an angle of ${30^0}$ with horizontal is $\left( {{\rm{g\;}} = 10{\rm{\;m}}{{\rm{s}}^{ - 2}}} \right)$

A projectile is fired with a velocity v at an angle $heta$ with the horizontal. The speed of the projectile when its direction of motion makes an angle β with the horizontal is

Which of the following remains constant during the motion of a projectile (neglecting air resistance)?