The following passages and associated questions are based on the material of Part II.
Big Air
A new generation of pogo sticks lets a rider bounce more than 2 meters off the ground by using elastic bands to store energy. When the pogo’s plunger hits the ground, the elastic bands stretch as the pogo and rider come to rest. At the low point of the bounce, the stretched bands start to contract, pushing out the plunger and launching the rider into the air. For a total mass of 80 kg (rider plus pogo), a stretch of 0.40 m launches a rider 2.0 m above the starting point.
Suppose a much smaller rider (total mass of rider plus pogo of 40 kg) mechanically stretched the elastic bands of the pogo by 0.40 m, then got on the pogo and released the bands. How high would this unwise rider go?
A. 8.0 m
B. 6.0 m
C. 4.0 m
D. 3.0 m
Want to see the full answer?
Check out a sample textbook solutionChapter P Solutions
College Physics: A Strategic Approach (4th Edition)
Additional Science Textbook Solutions
Conceptual Physics (12th Edition)
Physics for Scientists and Engineers with Modern Physics
Introduction to Electrodynamics
University Physics with Modern Physics (14th Edition)
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
An Introduction to Thermal Physics
- As you can see the question only has one question (part A only) What I need you to do is come up with a creative part 2 (a part b question) to extend this question. (do not need to solve question just come up with a part b part for this question) A block of wood is projected up an inclined plane with initial speed up. If the inclination of the plane is 30° and the coefficient of sliding friction = 0.1, find the total time for the block to return to the point of projection.arrow_forwardLast edit was seconds ago 11 + BIUA EEEE 13 E 2 3 A car mass equal to 1000kg drives on a bridge over a river at a speed of 8m/s. The bridge is 12meters on the greatest. a) what is the total energy of the car while it is on the bridge? b) now imagine the car is parked on a very tall building, how big would the building need to be for the car to have the same total energy that it did in part a? Carrow_forwardProvide a complete solution to each problem. 1. Garfield and Jon fought. To patch things up with Jon, Garfield caught a mouse who was eating Jon's favorite cheese in the last few days. While the mouse was sleeping on a rug, Garfield put a cage on it and drag the rug towards Jon with a constant honzontal force of 4N at a constant speed v. If Garfield's force did work at a rate of 8 W, a. How fast was he pulling on the rug? b. How much work did Garfield do in 5 s?arrow_forward
- A student of mass 40 kg dives from the 25 meter platform into the pool below. A. Determine the Ug stored in the person-Earth system when the student is at the top of the platform. B. Calculate how much K does the diver possess at impact. Calculate the diver’s velocity at impact. C. Repeat steps a and b for a 80 kg diver. Explain your results (using energy in your argument). D. If she jumped from a platform that was twice as high, how many times greater would be her velocity at impact? Explain your results (using energy). E. How much higher would the platform have to be in order for her velocity to be twice as great?arrow_forwardParts C and D please! Thank you Biomass can be used to create ethanol fuel. It can also be used to generate electricity, that can then be used to charge electric vehicles (EVs). In this problem, you will determine whether ethanol or electricity can provide a higher biomass‐to‐wheel efficiency. Assume that one hectare of cropland can produce 14 tons of dry switchgrass per year and that dry switchgrass has an energy density of 15 MJ/kg. a. Each ton of dry switchgrass can be processed to produce 73 gallons of ethanol. Ethanol has an energy density of 92 MJ/gallon. Assume that the internal combustion engine (ICE) is 23% efficient in converting fuel energy to useful work at the wheels (motion). With what efficiency is biomass energy delivered to the wheels in this ICE car? b. Alternatively, each ton of dry switchgrass could be used directly to generate electricity, and this electricity could in turn be used to operate an EV. Assume that a biomass‐fueled power plant has a first law…arrow_forwardShow energy transformation equation of each scenario. a) Car coming to stop for the red light. b) Space shuttle lifts off from the Cape Canaveral c) Firework goes up in the sky and lights up.arrow_forward
- How does the amount of energy coming from the energy source (low vs. high) affect the amount of electrical energy created. Why must the cyclist be fed if she wants to continue to pedal? In the space below, explain why this simulation is a good way to illustrate the Law of Conservation of Energy. Use a specific example to support your answer.arrow_forwardDirection: Solve the problem below and write your answer on a separate sheet of paper. 1. At an airport, Anna is stationary, Bert is walking at a speed of 1.0 m/s, Carla is standing while Dodong is walking on a platform that moves with a speed of 2.0 m/s. Anna observes Bert, Carla, and Dodong be moving away from her in the same direction. Anna observes Dodong be moving away from her at a speed of 3.0 m/s. a. What is Anna's velocity relative to the ground or earth? b. What is Dodong's velocity with respect to Carla? c. What is Dodong's normal walking speed? d. What is Carla's velocity relative to Bert? 2. A boat is heading north as it crosses a wide river with a speed of 8.00 km/h relative to the water. The river has a uniform velocity of 6.00 km/h dues east. Determine the magnitude and direction of the boat's velocity with respect to an observer on the riverbank. (Note write all the possible direction of the motion)arrow_forwardAt room temperature, an oxygen molecule, with mass of 5.31 x 10-26 kg, typically has a kinetic energy of about 6.21 x 10-21 J. Part A How fast is it moving?arrow_forward
- What do we first need to calculate in order to determine the minimum initial velocity of the roller coaster if it is going this double loop? a.total mechanical energy in the system b.mechanical energy at the top of the loop c.potential energy at the top of the loop d.kinetic energy at the top of the looparrow_forward7. Given the graph below answer the follow- ing questions. a. What is the value of for this system? b. If the frictional force is 1.5 N, what is FN? c. Does tripling F triple Fappled? d. Do Fpplied and Fy act in the same direction? Explain why or why not. 2 4 8 FN (N) 6 2. (N)arrow_forwardUse 3 - 5 complete sentences to describe an example of energy changing back and forth between kinetic and potential energy. Make sure to proofread your response for spelling, grammar, and other language mechanics.arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON