Question 4 (1 point) Choose the best description of work based on this chapter. 0 mental or physical effort done to achieve a purpose or result 0 employment or a job 0 the energy that a force gives to an object when the force moves the object O the sum of the magnitude of an object's displacement and the component of the applied force in the direction of the displacement Question 5 (1 point) An 3 kg object has a kinetic energy of 100 J. At what speed is it travelling? 04 '103m/s 0 none of the above Question 6 (1 point) An apple with mass 0.3 kg falls 3 m from a tree branch to the ground. When is the mechanical energy of the apple greatest? O at the beginning of the fall 0 at the end of the fail O at the half way point of the fall 0 all of the above