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 (3rd 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
- An object, weighing 260 pound-force [lbf], is dropped on the Earth. You may ignore air friction. The object's velocity as the object hits the ground is 65 feet per second [ft/s]. Part 2 How much energy, in units of joules [J], does the object have just before hitting the ground? State your answer using the appropriate SI prefix such that one, two, or three digits appear to the left of the decimal.arrow_forward5.4 Problem #31 Picture of (a) is attatched (b) part of question asks "Then use Newton's Second Law of Motion (force=mass×acceleration) and the substitution u=v(t) to evaluate the integralarrow_forwardA spring-loaded toy gun is used to shoot a ball straight up in the air. (Figure 1)The ball reaches a maximum height H, measured from the equilibrium position of the spring. The same ball is shot straight up a second time from the same gun, but this time the spring is compressed only half as far before firing. How far up does the ball go this time? Neglect friction. Assume that the spring is ideal and that the distance by which the spring is compressed is negligible compared to H.arrow_forward
- A bird cage, with a parrot inside, hangs from a scale. The parrot decides to hop to a higher perch. What can you say about the reading onthe scale (a) when the parrot jumps, (b) when the parrot is in the air,and (c) when the parrot lands on the second perch? Assume that thescale responds rapidly so that it gives an accurate reading at all times.arrow_forward#1) A block slides starts from rest and slides down the ramp and compresses the spring shown by 0.220 m. There is no friction between any surfaces. (see figure) At what distance from the bottom of the ramp did the block start? How fast is the block going right before it hits the spring?arrow_forwardChoose the correct answer: 1. Two students, A and B, of equal mass, compete to climb the San Cristobal hill by the car path. Student A makes the ascent in 30 minutes and student B delays a time of 15 minutes. If Wa is work minimum work done by student A and Wb is the minimum work done by student B, then it has to be: A. Wa = Wb B. Wa = 2Wb C. 2Wa = Wb D. You need to know the height of the hill. E. None of the above. 2. Regarding the power developed by students A and B in the previous question, it can be said that: A. Pa = Pb B. Pa = 2Pb C. Pa = Pb/2 D. Pa = Pb/4 E. None of the abovearrow_forward
- A dart is loaded into a spring-loaded toy dart gun by pushing the spring in by a distance x. For the next loading, the spring is compressed a distance of 2x. How much faster does the second dart leave the gun compared with the first? Explain your answer using the appropriate equations.arrow_forward1)calculate the total energy before the log falls over the edge. 2). Calculate the velocity of the log as it hits the bottom of the waterfall. 3). Discuss any limitations or assumptions regarding your calculation in part 2.arrow_forwardin Monkey and hunter case . my doctor want me to write a 5 lines about what I have learned from this screenshot. ( The simulation shows the classic physics situation of a monkey and hunter. In this case, the hunter is trying to tranquilize the monkey, so the monkey can be relocated to a better habitat. The monkey is clever—when the tranquilizer dart (in blue) leaves the gun, the monkey (in purple) lets go of the tree branch, and starts to fall straight down. Note that there is a net (not shown) at the bottom to catch the monkey, so the monkey won't get hurt.)arrow_forward
- A roller-coaster car has a mass of 500kg when fully loaded with passengers. The path of the coaster from its initial point shown in the figure to point B involves only up-and-down motion (as seen by the riders), with no motion to the left or right.(a) If the vehicle has a speed of 20.0m/s at point A, what is the force exerted by the track on the car at this point?(b) What is the maximum speed the vehicle can have at point B and still remain on the track? Assume the roller-coaster tracks at points A and B are parts of vertical circles of radius r 1=10.0m and r 2=15.0m, respectively.arrow_forward1.Using your measurements from Table 1, calculate the total kinetic energy of the two carts before collision for each trial (this is the initial kinetic energy, K). Show your calculations below and record your results in Table 2. 2. Using your measurements from Table 1, calculate the total kinetic energy of the two carts after collision for each trial (this is the final kinetic energy, Kʹ). Show your calculations below and record your results in Table 2. 3. Calculate the % change in kinetic energy during the collision for each trial. Show your calculations below and record your results in Table 2. % change = final − initia/ initial × 100 4.You will probably find that the total momentum changed slightly during each trial. Explain what might have caused the total momentum of your system to change during the collisions. 5.You should have found that the collision reduced the total kinetic energy of your system in each trial. Where did the kinetic energy lost during the collision go? In…arrow_forwardTrue or False (Explain if False) 1. Despite possible risks, Kanye throws his child, North, straight up into the air and catches her, while his wife, Kim, was not around. Kim has the highest energy at the peak of her flight. 2. Triton, one of Neptune's moons, does not crash into the surface of Neptune because there is no gravity between them. 3.Bill pushes his silver bicycle down a road in Derry at a constant velocity. Of the four forces (friction, gravity, normal force, and pushing force) acting on the bicycle, the greatest amount of work is exerted by friction.arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning