30. Juggles and Bangles are clowns. Juggles stands on one end of a teeter-totter at rest on the ground. Bangles jumps off a platform 2.5 m above theground and lands on the other end of the teeter-totter, launching Jugglesinto the air. Juggles rises to a height of 3.3 m above the ground, at whichpoint he has the same amount of gravitational potential energy as Bangleshad before he jumped, assuming both potential energies are measuredusing the ground as the reference level. Bangles' mass is 86 kg. What isJuggles' mass?

The gravitational potential energy PE of an object,…

Answered: 30. Juggles and Bangles are clowns.…

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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1. So imagine a wombat named Horace at rest. It's somehow on the top of a long telephone pole. It has a mass of 44.0 kg. It then slides down the pole reaching a final speed of 5.95 m/s just before reaching the bottom 12.4 later. (a) Calculate the change in the gravitational potential energy of Horace from top to bottom. (b) What is Horace's kinetic energy just before reaching the bottom? (c) What is the average force of friction that acts on Horace while sliding?
2. Three blocks with masses m1 = 4.31 kg, m2 = 8.73 kg, and m3 = 17.2 kg, respectively, are attached by massless strings over pulleys without friction, as indicated in the Figure. The horizontal surface exerts a force of friction of 12.5 N on m2. If the system is released from rest, use energy concepts to find the speed of m3, after it moves down by 3.25 m.
6. An object whose weight is 100 lbf experiences a decrease in kinetic energy of 500 ft. Ibf and an increase in potential energy of 1500 ft lbf. The initial velocity and elevation of the object, each relative to the surface of the earth, are 40 ft/s and 30 ft, respectively. If g = 32.2 ft/s², determine: (a) the final velocity, in ft/s. (b) the final elevation, in ft.
A box of unknown mass is sliding with an initial speed v₁ = 4.30 m/s across a horizontal frictionless warehouse floor when it encounters a rough section of flooring d = 2.80 m long. The coefficient of kinetic friction between the rough section of flooring and the box is 0.100. Using energy considerations, determine the final speed of the box (in m/s) after sliding across the rough section of flooring. m/s
An object with an initial potential energy of 40 J is dropped from rest. After a while, its potential energy is 10 J, and its kinetic energy is 5 J. Construct a possible scenario that might explain this situation.
Below is the potential energy diagram for a 50 gram particle. If the particle's mechanical energy is 7J: 10 U (1) 9 8 7 6 5 4 3 2 1 0 1 2 3 4 6 7 8 9 10 11 12 x (cm) A. Draw a line corresponding to the total Energy on the diagram. B. Assume the particle is moving in the positive x direction. Where is the particle speeding up? C. Assume the particle is moving in the positive x direction. Where is the particle lowing down? D. Where are any turning points in the particle's motion? E. What is the particle's speed at x=5 cm? F. What is the particle's maximum kinetic energy? Where does that occur? G. Suppose the particle's energy is decreased to 4J while the particle is between positions x = 7 cm and x = 9 cm. What is the particle's new maximum speed? Where does that occur?
A 40 N object has 80 joules of potential energy. The object is at a height of 0.5 meters. True or false
A 7.44-kg particle is subject to a net force that varies with position as shown in the figure. The particle starts from rest at x = 0. Fx (N) 3 2 2 4 6 8 10 12 14 16 What is its speed at the following positions? (a) x = 5.00 m 154.32 X Can you determine the kinetic energy of the particle at x = 5.00 m from the given graph? m/s (b) x = 10.0 m 154.33 x (m) X You appear to have added your result from part (a) to a speed calculated from the work done between 5 and 10 m. This doesn't work; you must calculate the work done over the entire 10 m distance. m/s (c) x = 15.0 m 151.31 X The force is positive throughout the entire interval. Does it make sense that the speed would decrease m/s
For its size, the commonflea is one of the most accomplished jumpers in the animal world.A 2.0-mm-long, 0.50 mg flea can reach a height of 20 cm in a singleleap. Calculate the kinetic energy of this flea at takeoff and its kinetic energy per kilogram of mass.
II. Instruction:Solve the following problems. Present in writing the full details of your answer or solutions. 1. What is the change in gravitational potential energy for a 70 kg man walking up stairs from a height of 64 m to 108 m? a. - 30215 J b. 30215 J 2. A 1500 kg car accelerates from o to 25 m/s in 8 s. What is the average power delivered by the engine (1 hp = 746 watts)? a. 68.5 hp b. 88.5 hp 3. A hammerhead of mass m = 4 kg is allowed to fall onto a nail from a height h = 0. 5 m. determine the maximum amount of work it could c. -30130 J d. 30130J с. 78.5 hp d. 98.5 hp do on the nail. a. 19.62 J b. 18.62 J с. 17.62 J d. 16.62 J
Karen lifts a 10.0 kg box up from the ground to a height of 1.50 meters. He then lowers the box to 0.630 m above the ground. What is the change in potential energy of the box in Joules? change in potential energy between final and inital height.

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