CHAPTER 9 9-7Work and Kinetic Energy9.4 Restoring Forces and the Work Done by a Spring19. A spring is attached to the floor and pulled straight up by a string. The string's tension is measured.The graph shows the tension in the string as a function of the spring's length L.T(N)Tension T105LL (cm)10a. Does this spring obey Hooke's Law? Explain why or why not.58w.Huc dot112RKb. If it does, what is the spring constant?20. Draw a figure analogous to Figure 9.17 in the textbook for a spring that is attached to a wall on theright end. Use the figure to show that F and As always have opposite signs.20

Part A:Yes,The given spring obeys Hook’s law because the tension induced in the spring is linearly…

Answered: CHAPTER 9 9-7 Work and Kinetic Energy…

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 spring with a spring constant of 100 N/m is stretched by a force of 10 N. What is the elastic PE stored in the stretched spring? a. 0.5J b. 0.3J C. 0.4J d. 0.25 J
There is a 2.02 kg box at three points in time. Initial the box is moving to the left at 12 m/s. A. How much kinetic energy is does the box have while moving to the left in time 1? _________ JoulesB.The box then hits into a spring with a spring constant of 534 N/m. At the point of max compression all of the boxes kinetic energy goes into elastic potential energy. How much is the spring compressed at that point ______ meters
2. The potential energy function associated with a force acting on a system is U = 3x3 – 5x. a) What is the equation for force for this system? b) Draw a graph of the potential energy. Indicate the points of equilibrium and note whether they are stable, unstable or neutral.
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A 13.0 kg block is being lifted up into a truck along a ramp that is 3.50 m in length. The ramp is inclined at an angle of 30.0 to the horizontal. A worker applies a constant force of 110.0 N parallel to the incline. The coefficient of friction for the movement of the block over the incline is 0.25.
It takes 1.81 J of work to compress a spring 13.1 cm. What is the force constant of the spring in N/m? A. 210.96 N/m B. 2.11 N/m C. 13.8 N/m D. None of the choices (Provide the correct answer)
the potential energy of a particle is given by U(x)= (9 J/m^4)x^4-(8 J/m^2)x^2. At what value of x would the particle be in unstable equilibrium? A.) -2/3 m B.) sqrt of 8/9 m c.) 0 m d.) 2/3 m e.) sqrt of - 8/9 m
For which of the following is potential energy is converted into kinetic energy? A. Swing swing comes to a stop B. A bowling ball rolls horizontally C. A boulder rolling down a hill hits a wall and stops moving A rubber band and soars across the room
3. The height above the ground of a boy riding on a swing varies from 70 cm at the lowest point to 220 cm at the highest point. a. Draw the simple, neat figure and label properly. b. Write the energy conservation equation of the system. c. Determine the maximum speed of the boy?
You are loading a toy dart gun, which has two settings, the more powerful with the spring compressed twice as far as the lower setting. If it takes 5.0 J of work to compress the dart gun to the lower setting, how much work does it take for the higher setting? a. 20 J b. 10 J c. 2.5 J d. 40 J
7. DETAILS MY NOTES A toy cannon uses a spring to project a 5.28-g soft rubber ball. The spring is originally compressed by 4.90 cm and has a force constant of 8.01 N/m. When the cannon is fired, the ball moves 15.9 cm through the horizontal barrel of the cannon, and the barrel exerts a constant friction force of 0.032 3 N on the ball. ASK YOUR TEACHER (a) With what speed does the projectile leave the barrel of the cannon? m/s (b) At what point does the ball have maximum speed? cm (from its original position) (c) What is this maximum speed? m/s
A child has two red wagons, with the rear one tied to the front by a stretchy rope (a spring). If the child pulls on the front wagon, the ____ increases. a. kinetic energy of the wagons b. potential energy stored in the spring c. both A and B d. not enough information

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