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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A hotel elevator ascends 200 m with maximum speed of 5 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s². Part A How far does the elevator move while accelerating to full speed from rest? Express your answer with the appropriate units. 0 Value Part B Submit Request Answer µÅ 0 ☐☐ How long does it take to make the complete trip from bottom to top? Express your answer with the appropriate units. Submit Units μÅ Value Units ? Request Answer 2 ?
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A particle moves along a straight path with an acceleration of a = (4/s) m/s², where s is in meters. Part A Determine the particle's velocity when s = 6 m, if it is released from rest when s = 1 m. Express your answer to three significant figures and include the appropriate units. V= Value Submit μA Provide Feedback Request Answer Units ?
A. using your measured distance (35 inches) your average time of motion (drop times 2.04s,1.78,2.26,1.59,1.87 and 1.91)and the constant acceleration equation (x=1/2 at^2)calculate the acceration of the atwood machine. B. using m2-m2/m1+m2(9.8)=20/40=0.5x9.8=4.9 and the masses (60,70g) calculate the expected acceleration. C. what quanatiative compariosn is most appropriate between your results (percent difference or error)?
A car is driving along a circular track of diameter d = 0.75 km at a constant speed of v = 22 m/s.a. Write an expression for the magnitude of acceleration a of the car in terms of the given parameter. b. What is the magnitude, in meters per second squared, of the acceleration a of the car. c. Write an expression for the minimum coefficient of the friction μ between the car's tires and the road that is required in order to keep the car going in a circle in terms of the given parameters.
Part A Determine the stopping distances for an automobile going a constant initial speed of 94 km/h and human reaction time of 0.40s, for an acceleration a = -2.6 m/s². Express your answer using two significant figures. 9. X•10" d = Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining The correct answer does not depend on: m. Part B Determine the stopping distances for an automobile going a constant initial speed of 94 km/h and human reaction time of 0.40 s, for an acceleration a = -5.7 m/s². Express your answer using two significant figures. να ΑΣΦ ? d = m
The position of a ball as a function of time is given by x = (4.3 m/s)t + (-8 m/s²)t². Part A What is the initial position of the ball? Express your answer to two significant figures and include appropriate units. Value Submit Part B µÅ Submit Value Units Request Answer What is the initial velocity of the ball? Express your answer to two significant figures and include appropriate units. μᾶ Units ? Request Answer ?
A particle P starts at time t = 0 s at the polar position x = -15 m y = 8 m. The velocity of the particle is written in the polar basis associated with its current position, and is: v = 2ê, m/s. If we have final and final, then we can find final and final with: X final symbolic expression X = ? m, yfinal ? Give your answers in symbolic form. You should use the scalar variables r_f and theta_f. Functions are available like sin(), cos(), atan2(), sqrt(), and log(), as well as the mathematical constants pi and e. The regular arithmetic operators are +, -, *, and /, and x^y means x to the power of y. 5t + k would translate to 5*t+k. Now, find the final Cartesian position of the particle at time t = 2. symbolic expression m, y = ? m m
A skateboarder travels on a horizontal surface with an initial velocity of 3.6 m/s toward the south and a constant acceleration of 2.5 m/s? toward the east. Let the z direction be eastward and the y direction be northward, and let the skateboarder be at the origin at t =0.
3.) You throw a ball straight up. The ball leaves your hand at a height of 2.00 m above the ground with a speed of 20.0 m/s (~45 mph). Ignore air resistance and use g = 10.0 m/s2 to answer the following questions. You can use a spreadsheet but show your sample calculations. 3a.) Calculate the height, y(t), and velocity, vy(t), at 0.50 second intervals until the ball hits the ground. Show your results in a table and put the units in the column headers: t (s), vy (m/s), y (m). 3b.) Use this data to draw a motion diagram for the ball at 0.50 second intervals. Label the height and the speed at each time interval. Label the origin, starting height, maximum height, and final height. Include the velocity vectors for each time and location of the ball. 3c.) Calculate the time it takes for the ball to hit the ground and the final velocity of the ball just as it hits the ground. Include this velocity vector in your diagram.
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Question A1 An object slides off a frictionless, horizontal table from a height of 1.40 m above the floor. It strikes the floor a distance of 1.88 m from the base of the table. a) Calculate the speed with which the object leaves the table. b) Calculate the velocity (magnitude and direction) of the object just before it strikes the floor.

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