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?

v=41.23 m/s

Explanation:

Given

mass of heavy object

distance of from the axle

mass of rock

Length of rod

distance of from axle

Net torque acting is

Work done by is converted to rock kinetic Energy

thus

Where

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.