In hostel playground, Jiyang hits a ball directly aiming the upper parts of a square window (BCDE) at angle 45° with initial velocity u =10m/sec. The ball crosses the window horizontally at its lower parts. The area of window is

A ball is projected with 20sqrt2 m//s at angle 45^(@) with horizontal.The angular velocity of the particle at highest point of its journey about point of projection is

A cricket ball of mass m is hitted at the angle 45^(@) to the horizontal with velcoity v its kinetic energy at the topmost point is

Consider 3 identical balls, each having mass of 0.1 kg. The ball A has an initial velocity of 10 sqrt( 3) m//s . It then collides simultaneously with balls B and C, whose centres are on a line perpendicular to the initial velocity of the ball A. They are initially in contact with each other and are at rest. The ball A is aimed directly at the contact point of B and C. After the collision, if the ball A comes to rest, then

A ball is thrown from a point O aiming a target at angle 30^(@) with the horizontal so that the ball hits the target at B but the ball hits at point A, a vertical distance h below B. If the intial velocity of the ball is 20 ms^(-1) and the horizontal distance between O and C is 10 m. Find the value of h.

A projectile is fired with velocity u at an angle theta with horizontal. At the highest point of its trajectory, it splits up into three segments of masses m, m and 2m. First part falls vertically downward with zero initial velocity and second part returns via same path to the point of projection. The velocity of third part of mass 2 m just after explosion will be

When a particle is projected at some angle with the horizontal, the path of the particle is parabolic. In the process the horizontal velocity remains constant but the magnitude of vertical velocity changes. At any instant during flight the acceleration of the particle remains g in vertically downward direction. During flight at any point the path of particle can be considered as a part of circle and radius of that circle is called the radius of curvature of the path Consider that a particle is projected with velocity u=10 m//s at an angle theta=60^(@) with the horizontal and take value of g=10m//s^(2) . Now answer the following questions. The radius of curvature of path of particle at the instant when the velocity vector of the particle becomes perpendicular to initial velocity vector is

When a particle is projected at some angle with the horizontal, the path of the particle is parabolic. In the process the horizontal velocity remains constant but the magnitude of vertical velocity changes. At any instant during flight the acceleration of the particle remains g in vertically downward direction. During flight at any point the path of particle can be considered as a part of circle and radius of that circle is called the radius of curvature of the path Consider that a particle is projected with velocity u=10 m//s at an angle theta=60^(@) with the horizontal and take value of g=10m//s^(2) . Now answer the following questions. The magnitude of acceleration of particle at that instant is

When a particle is projected at some angle with the horizontal, the path of the particle is parabolic. In the process the horizontal velocity remains constant but the magnitude of vertical velocity changes. At any instant during flight the acceleration of the particle remains g in vertically downward direction. During flight at any point the path of particle can be considered as a part of circle and radius of that circle is called the radius of curvature of the path Consider that a particle is projected with velocity u=10 m//s at an angle theta=60^(@) with the horizontal and take value of g=10m//s^(2) . Now answer the following questions. Tangential acceleration of particle at that instant is

A ball is thrown vertically upwards from the ground and a student gazing out of the window sees it moving upward past him at 10ms^-1. The window is at 15 m above the ground level. The velocity of ball 3 s after it was projected from the ground is [Take g= 10 ms^-2 ]

A ball is thrown with velocity 8 ms^(-1) making an angle 60° with the horizontal. Its velocity will be perpendicular to the direction of initial velocity of projection after a time of (g =10ms^(-2) )