To find the height of an overhead power line, you throw a ball straight upward.The ball passes the line on the way up after 0.75 s , and passes it again on theway down 1.5 s after it was tossed.Part AWhat is the height of the power line?Express your answer using two significant figures.h =SubmitRequest AnswerPart BWhat is the initial speed of the ball?Express your answer using two significant figures.?vo =ValueUnitsSubmitRequest Answer

Given : tup = 0.75 s tdown = 1.5 s

Answered: To find the height of an overhead power…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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In an experiment, a shearwater (a seabird) was taken from its nest, flown a distance 5120 km away, and released. It found its way back to its nest 12.5 days after release. Part A If we place the origin in the nest and extend the +x-axis to the release point, what was the bird's average velocity for the return flight? Express your answer in meters per second. ANSWER: Vay.-x = m/s Part B What was the bird's average velocity for the whole episode, from leaving the nest to returning? Express your answer in meters per second. ANSWER: Vav. = m/s
The cliff divers of Acapulco push off horizontally from rock platforms about h = 41 m above the water, but they must clear rocky outcrops at water level that extend out into the water L = 4.1 m from the base of the cliff directly under their launch point (Figure 1). Part A What minimum pushoff speed is necessary to clear the rocks? Express your answer to two significant figures and include the appropriate units. ? Value Units Submit Request Answer Part B How long are they in the air? Express your answer to two significant figures and include the appropriate units. ? Figure Value Units %3D Submit Request Answer Provide Feedback P Pearson lyp NON- FOLLOW ME DESKTC WAVE ID
A speed skater moving across frictionless ice at 7.80 m/s hits a 4.70-m-wide patch of rough ice. She slows steadily, then continues on at 5.20 m/s. Part A What is her acceleration on the rough ice? ΑΣΦ ? m/s²
In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80 m/s². Ignore air resistance. Part A A flea jumps straight up to a maximum height of 0.410 m. What is its initial velocity vo as it leaves the ground? Express your answer in meters per second to three significant figures. ▸ View Available Hint(s) 20 2.83 m/s Submit ✓ Correct Part B Previous Answers How long is the flea in the air from the time it jumps to the time it hits the ground? Express your answer in seconds to three significant figures. ► View Available Hint(s) time in air = Submit 1951 ΑΣΦ Previous Answers Request Answer wood ? S
Part A The truck travels along a circular road that has a radius of 50 m at a speed of 4 m/s. For a short distance when t = 0, its speed is then increased by at = (0.4t) m/s², where t is in seconds.(Figure 1) How long does it take for the truck to reach 13.80 m ? vec Submit Request Answer Part B Determine the speed of the truck when has traveled 13.80 m . Express your answer with the appropriate units. HÀ Value m/s Submit Request Answer Part C Figure 1 of 1 Determine the magnitude of the truck's acceleration when has traveled 13.80 m . Express your answer with the appropriate units. 50 m HA Value a m/s?
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Part A You are driving home from school steadily at 94 km/h for 180 km. It then begins to rain and you slow to 65 km/h instantly. You arrive home after driving 4.0 hours. How far is your hometown from school? Express your answer using two significant figures. d = km Submit Request Answer Part B What was your average speed? Express your answer using two significant figures. km/h Submit Request Answer
Part A At the starting gun, a runner accelerates at 2.0 m/s for 5.5 s. The runner's acceleration is zero for the rest of the race. You may want to review (Pages 29 - 33) . What is the speed of the runner at t = 2.0 s? Express your answer using two significant figures. ΑΣφ ? m/s Submit Request Answer Part B What is the speed of the runner at the end of the race? Express your answer using two significant figures. m/s Submit Request Answer Provide Feedback
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A car drives on a highway with a speed of 64 mi/h. Part A What is this speed in km/h? Express your answer to two significant figures. ΑΣφ. km/h
Constant The acceleration of a stone is given by az (t) = -2.04 m/s + (3.10 m/s )t. %3D Part A What is the initial velocity VOz such that the stone will have the same x-coordinate at time t = 3.90 s as it had at t =0. Express your answer in mneters per second. ΑΣΦ m/s Submit Request Answer Part B Find the velocity at time t = 3.90 s? Express your answer in meters per second. ΑΣΦ m/s

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