3. A stone is thrown vertically upward at a velocity of 10 m-s-' from the top of a tower
of height 50 m. After some time the stone passes the edge of the tower and strikes
the ground below the tower. Ignore the effects of friction.
3.1 Calculate the time taken by the stone to reach its maximum height above the
ground
3.2 Calculate the maximum height the stone reaches above the tower.
3.3 Sketch the position time graph for the motion of the stone.
3.4 On its way down, the stone takes 0,1 s to pass a window of height 1,5 m, as shown
in the diagram above. Calculate the distance y, from the top of the window to the
ground
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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.