On monday, john wears a red shirt and notices his co workers seem less patient with him. on wednesday, john wears a blue shirt and notices that none of his coworkers approach him, working quietly the entire day. on friday, john wears a yellow shirt and notices that everyone is cheerful and full of glee. from this, john strikes up a hypothesis to say that the mood of his colleagues must be as a result of the color of his shirt . is this true l, false, or unsubstantiated

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.