The jet water ski has reached its maximum velocity of 70 km/h when operating in salt wat...

The jet water ski has reached its maximum velocity of 70 km/h when operating in salt water. The water intake is in the horizontal tunnel in the bottom of the hull, so the water enters the intake at the velocity of 70 km/h relative to the ski. The motorized pump discharges water from the horizontal exhaust nozzle of 50-mm diameter at the rate of 0.082 m³/s. Calculate the resistance R of the water to the hull at the operating speed.