The floor grid in Figure 1 is subject to a uniform pressure of SN/2 kPa. All dimensions are in meters. (a) Draw the tributary area of the interior beam X-Y, girder C3-D3 and column A1.
(b) Calculate and sketch the loading acting on each of the above elements.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?