When an object is shot from the bottom of a long smooth inclined plane kept at an angle 60°with horizontal, it can travel a distance x1 along the plane. But, when the inclination is decreased to 30° and the same object is shot with the same velocity, it can travel x2 distance. Then x1:x2 will be
A hollow cylinder is rolling on an inclined plane, inclined at an angle of 30o to the horizontal. Its speed after travelling a distance of 10 m will be