A high-speed vehicle releases a drag chute to slow the vehicle down. The vehicle has a...

  

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A high-speed vehicle releases a drag chute to slow the vehicle down. The vehicle has a mass of 500 kg and the chute is hemispherical in shape with a diameter of 1.75 m. The drag coefficient for the chute is 1.5 and is independent of vehicle speed. If the chute is released when the vehicle speed is 315 km/hr, calculate the time taken for the vehicle's speed to reduce to 60 km/hr. Assume the drag on the vehicle and friction between the vehicle and the ground are negligible compared with the drag on the chute and that no other braking mechanism is deployed while the vehicle is slowing. Consider the density of air as 1.23 Kg/m³ and viscosity of air is -= 1.79x10-5 N.s/m². Part (B) An aeroplane is cruising at a velocity of 220 m/s at an altitude of 10 km (air density = 0.41 Kg/m³). The weight and wing platform areas of the aeroplane are 65 kN and 32 m², respectively. The drag coefficient at cruse is 0.015. Calculate the lift coefficient and the ratio of lift Force to drag force. A high-speed vehicle releases a drag chute to slow the vehicle down. The vehicle has a mass of 500 kg and the chute is hemispherical in shape with a diameter of 1.75 m. The drag coefficient for the chute is 1.5 and is independent of vehicle speed. If the chute is released when the vehicle speed is 315 km/hr, calculate the time taken for the vehicle's speed to reduce to 60 km/hr. Assume the drag on the vehicle and friction between the vehicle and the ground are negligible compared with the drag on the chute and that no other braking mechanism is deployed while the vehicle is slowing. Consider the density of air as 1.23 Kg/m³ and viscosity of air is -= 1.79x10-5 N.s/m². Part (B) An aeroplane is cruising at a velocity of 220 m/s at an altitude of 10 km (air density = 0.41 Kg/m³). The weight and wing platform areas of the aeroplane are 65 kN and 32 m², respectively. The drag coefficient at cruse is 0.015. Calculate the lift coefficient and the ratio of lift Force to drag force.