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IP BIO Flight of the Samara A 1.21-g samara—the winged
Chapter 5, Problem 42P(choose chapter or problem)
Flight of the Samara A 1.21-g samara—the winged fruit of a maple tree—falls toward the ground with a constant speed of 1.1 m/s (Figure 5–28). (a) What is the force of air resistance exerted on the samara? (b) If the constant speed of descent is greater than 1.1 m/s, is the force of air resistance greater than, less than, or the same as in part (a)? Explain.
Questions & Answers
QUESTION:
Flight of the Samara A 1.21-g samara—the winged fruit of a maple tree—falls toward the ground with a constant speed of 1.1 m/s (Figure 5–28). (a) What is the force of air resistance exerted on the samara? (b) If the constant speed of descent is greater than 1.1 m/s, is the force of air resistance greater than, less than, or the same as in part (a)? Explain.
ANSWER:
Step 1 of 3
The speed of samara is given to be constant. So, the acceleration on it is zero. This implies that the gravitational force of the earth is balanced by the air resistance.