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# hw 8 sol - Patel(pnp223 – homework 08 – Turner...

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Unformatted text preview: Patel (pnp223) – homework 08 – Turner – (92160) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Your friend says that inertia is a force that keeps things in their places, either at rest or motion. Do you agree? Why or why not? 1. Agree; only forces can keep things in their places. 2. Agree; inertia is not a force that keeps things moving. 3. Disagree; inertia is a force that keeps things moving. 4. All are wrong. 5. Disagree; inertia is a property of matter to behave this way, not some kind of force. correct Explanation: Inertia is the property of things to resist changes in motion. 002 (part 1 of 2) 10.0 points A gust of wind blows an apple from a tree. As the apple falls, the force of gravity on the apple is 9.39 N downward, and the force of the wind on the apple is 1.07 N to the right. What is the magnitude of the net external force on the apple? Correct answer: 9 . 45077 N. Explanation: Let : F y = − 9 . 39 N and F x = 1 . 07 N . F net − 9 . 39 N 1 . 07 N θ F net = radicalBig ( F x ) 2 + ( F y ) 2 = radicalBig (1 . 07 N) 2 + ( − 9 . 39 N) 2 = 9 . 45077 N . 003 (part 2 of 2) 10.0 points What is the direction of the net external force on the apple (measured from the downward vertical, so that the angle to the right of downward is positive)?...
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hw 8 sol - Patel(pnp223 – homework 08 – Turner...

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