Awar wolf is a device used during the middle ages to assault fortifications with large rocks. a simple trebuchet is constructed with a large, stiff 4.1 m rod (assume it has negligible mass) with a heavy object of mass 52 kg and 14 cm from the axle around which the device pivots and a cup on the far end that holds the rock. the war wolf is loaded when it is in a horizontal position, and the rock is projected horizontally when after it has rotated to a vertical position. if the rock has a mass of 123 g, how fast (linear speed) does it move when launched?