A spider spins a fine thread of spider silk between two posts a distance Lo apart....

 

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A spider spins a fine thread of spider silk between two posts a distance Lo apart. The thread has a diameter of d = 5 x 10-6 m and an equilibrium length of Lo. When the spider (with mass m = 2 mg) hangs from the center of the thread, the thread sags and stretches to support the weight of the spider, making an angle of 0 = 10° below the horizontal, as shown below. 0 Lo (a) Why must the thread sag when the spider hangs motionless from it? (b) Calculate the tensile strain e in the thread and the Young's modulus Y for the silk. A spider spins a fine thread of spider silk between two posts a distance Lo apart. The thread has a diameter of d = 5 x 10-6 m and an equilibrium length of Lo. When the spider (with mass m = 2 mg) hangs from the center of the thread, the thread sags and stretches to support the weight of the spider, making an angle of 0 = 10° below the horizontal, as shown below. 0 Lo (a) Why must the thread sag when the spider hangs motionless from it? (b) Calculate the tensile strain e in the thread and the Young's modulus Y for the silk. A spider spins a fine thread of spider silk between two posts a distance Lo apart. The thread has a diameter of d = 5 x 10-6 m and an equilibrium length of Lo. When the spider (with mass m = 2 mg) hangs from the center of the thread, the thread sags and stretches to support the weight of the spider, making an angle of 0 = 10° below the horizontal, as shown below. 0 Lo (a) Why must the thread sag when the spider hangs motionless from it? (b) Calculate the tensile strain e in the thread and the Young's modulus Y for the silk. A spider spins a fine thread of spider silk between two posts a distance Lo apart. The thread has a diameter of d = 5 x 10-6 m and an equilibrium length of Lo. When the spider (with mass m = 2 mg) hangs from the center of the thread, the thread sags and stretches to support the weight of the spider, making an angle of 0 = 10° below the horizontal, as shown below. 0 Lo (a) Why must the thread sag when the spider hangs motionless from it? (b) Calculate the tensile strain e in the thread and the Young's modulus Y for the silk.

Answer rating: 100% (QA)

a Why must the thread sag when the spider hangs motionless from it The thread sags because the weight of the spider exerts a downward force on the threadcausing it to bendThis bending creates a tensil... View the full answer