Name: ACI: SPH3U 2D Kinematics 18. The jet skier from the previous problem wants to travel directly across the lake. a. Determine the direction that he should head. b. How long will it take to cross the river? 19. A swimmer is standing on the south shore of a river that is 120 m wide. He wants to swim straight across and knows that he can swim at 1.9 m/s in still water. He determines that the current in the river is 0.80 m/s [E]. a. Determine the direction in which the swimmer should head so that he lands directly across the river on the north bank. b. Determine how long it will take him to reach the far shore. Page 16 of 24 G8 Here I don't have any numerical values for the velocity of the jet skiers in a calm lake and also the velocity of the current / across the lake . 50 ay I will use some symbols to I adfun those velocities . let velocity of jet skicre be = V in calm waters . I velocity of the current = > U lit the jet skier have to head art an angle from the bank as given in the figure to travel U Vsine directly across the Lake ( in a straight-verticle line ). ! In that case his horizontal velocity Vcos G must nullify the current velocity U . or , 6 : Cos' (U / V ) please put the numerical values of U I V from your reference a the previous question which is not included , to the get the result ] " ) The ver setskien will effectively cross the river with a verticle velocity of Vsing. If the length of the lake is 2, then time , he takes to crows the lake is given byy , 1 . / Vsing Vsin [ cos' (UN) ] please put the numerical values