A pivot mounted flap separates freshwater (right side) from air (left side). The flap is pivot-mounted at the vertical wall (please refer to figure Form Arses 4). The water level in the reservoir is d= 10.00 m. All other dimensions are given in figure Form Ase 4). Atmospheric pressure Po Freshwater reservoir Air 45 d- 10 m 1.50 m t=4 m Figure Form Assess 4 Pivot mounted flap separating a freshwater reservoir from air Density of freshwater Water level in the reservoir Prna =1000 kg/hm d= 10.00 m Given: a= 1.50 m a= 45 Maxinum opening of the flap Inclination angle of the flap Distance between the outlet level and the base level of the reservoir 1= 4.00 m i) Determine the necessary force given by the flap so that it starts opening at a water level of d= 10.00 m in the reservoir. i) Determine the necessary weight of the flap in kg out of the force calculated under i). Hint: Please consider a one meter strip only.