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Problem 2 (b) : Problem Statement and Question 2 (b) (b) A car plunged into a lake (p=1000 kg/m³) during an accident and landed at the bottom of the lake on its wheel Figure 2. Luckily, both cars were equipped by four power windows, but all electronic parts were broken at last. The front doors are 1.2 m high and 1 m wide, the rear doors are 1.2 m and 0.8 m and the top edge of the door and the bottom of floor are 10 m below the free surface of the water respectively. Assumptions: • The bottom surface of the lake is horizontal. • The car interior is well sealed so that no water leaks inside. • The doors can be approximated as a vertical and horizontal rectangular plate respectively. • The pressure in both car interiors remain at atmospheric value since there are no leaking in, and thus no compression of the air outside. Therefore, atmospheric pressure cancels out in the calculations since it acts on all sides of the door. • The weight of the cars is larger than the buoyant force acting on it. Determine the hydrostatic force of each front and rear doors, and location of the pressure senters. Discuss whether the driver can open the door or not, where is, a normal person can only push 1kN moment which is the moment acting on the midpoint of the submerged front and rear doors. Your answer Problem 2 (b) : Figure 3 Lake Sunroof 10 m 1.2 m 0.6 m Figure 3 Your answer

Problem 2 (b) : Problem Statement and Question 2 (b) (b) A car plunged into a lake (p=1000 kg/m³) during an accident and landed at the bottom of the lake on its wheel Figure 2. Luckily, both cars were equipped by four power windows, but all electronic parts were broken at last. The front doors are 1.2 m high and 1 m wide, the rear doors are 1.2 m and 0.8 m and the top edge of the door and the bottom of floor are 10 m below the free surface of the water respectively. Assumptions: • The bottom surface of the lake is horizontal. • The car interior is well sealed so that no water leaks inside. • The doors can be approximated as a vertical and horizontal rectangular plate respectively. • The pressure in both car interiors remain at atmospheric value since there are no leaking in, and thus no compression of the air outside. Therefore, atmospheric pressure cancels out in the calculations since it acts on all sides of the door. • The weight of the cars is larger than the buoyant force acting on it. Determine the hydrostatic force of each front and rear doors, and location of the pressure senters. Discuss whether the driver can open the door or not, where is, a normal person can only push 1kN moment which is the moment acting on the midpoint of the submerged front and rear doors. Your answer Problem 2 (b) : Figure 3 Lake Sunroof 10 m 1.2 m 0.6 m Figure 3 Your answer

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Problem 2 (b) : Problem Statement and Question 2 (b) (b) A car plunged into a lake (p=1000 kg/m³) during an accident and landed at the bottom of the lake on its wheel Figure 2. Luckily, both cars were equipped by four power windows, but all electronic parts were broken at last. The front doors are 1.2 m high and 1 m wide, the rear doors are 1.2 m and 0.8 m and the top edge of the door and the bottom of floor are 10 m below the free surface of the water respectively. Assumptions: The bottom surface of the lake is horizontal. The car interior is well sealed so that no water leaks inside. The doors can be approximated as a vertical and horizontal rectangular plate respectively. • The pressure in both car interiors remain at atmospheric value since there are no leaking in, and thus no compression of the air outside. Therefore, atmospheric pressure cancels out in the calculations since it acts on all sides of the door. • The weight of the cars is larger than the buoyant force acting on it. Determine the hydrostatic force of cach front and rear doors, and location of the pressure centers. Discuss whether the driver can open the door or not, where is, a normal person can only push 1kN moment which is the moment acting on the midpoint of the submerged front and rear doors. Your answer Problem 2 (b) : Figure 3 Lake Sunroof 10 m 1.2 m 0.6 m Figure 3 Your answer
Transcribed Image Text:Problem 2 (b) : Problem Statement and Question 2 (b) (b) A car plunged into a lake (p=1000 kg/m³) during an accident and landed at the bottom of the lake on its wheel Figure 2. Luckily, both cars were equipped by four power windows, but all electronic parts were broken at last. The front doors are 1.2 m high and 1 m wide, the rear doors are 1.2 m and 0.8 m and the top edge of the door and the bottom of floor are 10 m below the free surface of the water respectively. Assumptions: The bottom surface of the lake is horizontal. The car interior is well sealed so that no water leaks inside. The doors can be approximated as a vertical and horizontal rectangular plate respectively. • The pressure in both car interiors remain at atmospheric value since there are no leaking in, and thus no compression of the air outside. Therefore, atmospheric pressure cancels out in the calculations since it acts on all sides of the door. • The weight of the cars is larger than the buoyant force acting on it. Determine the hydrostatic force of cach front and rear doors, and location of the pressure centers. Discuss whether the driver can open the door or not, where is, a normal person can only push 1kN moment which is the moment acting on the midpoint of the submerged front and rear doors. Your answer Problem 2 (b) : Figure 3 Lake Sunroof 10 m 1.2 m 0.6 m Figure 3 Your answer
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