at the foot of the 10 A large heavy box is sliding without friction down a smooth plane of inclination 0 From a point P on the

Question

at the foot of the 10 A large heavy box is sliding without friction down a smooth plane of inclination 0 From a point P on the bottom of the box a particle is projected inside the box The initial speed of the particle with respect to the box is u and the direction of projection makes an angle a with the bottom as seen by an observer inside the box as shown in figure Pla 0 a Find the distance along the bottom of the box between the point of projection P and the point Q where the particle lands Assume that the particle does not hit any other surface of the box Neglect air resistance b If the horizontal displacement of the particle as seen by an observer on the ground is zerc find the speed of the box with respect to the ground at the instant when particle was projected

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