Question
what is the CER for both questions Need help? Christine is paragliding, being pulled by a rope attached to a boat. The boat is traveling
what is the CER for both questions Need help?
Christine is paragliding, being pulled by a rope attached to a boat. The boat is traveling to the left at a constant speed of 20 m/s; the angle of the rope is not given. Suppose the mass of Christine (along with her parachute) is 70kg, and the boat's mass is 600kg.
Part 1: It turns out that the force of the water on the boat is not straight up, but is at a slight angle. That water force on the boat is 300 N in the -x direction (left) and 5800 N in the +y direction (up). In component form, that water force on the boat reads:
The big question:What is the force of the air on the parachute?Give your answer in component form, and show the general direction of the force.
Use what you've learned in PHYS 2A to analyze this scenario.
- Draw a physical diagram.
- Create a complete model of thescenario
- Force diagrams as needed.
- Identify a third-law pair.
- Generate any relevant vector equations with proper notation.
- Answer the Big Question using the CER framework
This means using the evidence you created above. Be sure to reference specific elements/components of the relevantdiagram(s)and explicitly write out your "why" reasoning.
Part 2: Now, the rope is detached; Christine is no longer attached to the boat.
Big question:Immediately after the rope is detached, what is the acceleration of Christine? Give your answer in component form and show the general direction of the acceleration.
Use what you've learned in PHYS 2A to analyze this scenario.
- Draw a physical diagram.
- Create a complete model of thescenario
- Force diagrams as needed. You can re-use relevant information from the previous part, but recall that the wind force is now zero.
- Generate any relevant vector equations with proper notation.
- Answer the Big Question using the CER framework
This means using the evidence you created above. Be sure to reference specific elements/components of the relevantdiagram(s)and explicitly write out your "why" reasoning.
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