Concept explainers
The roller coaster ride starts with the car at rest at point A.
a. Rank from greatest to least the car’s speed at each point.
b. Rank from greatest to least the car’s kinetic energy at each point.
c. Rank from greatest to least the car’s potential energy at each point.
(a)

To Rank: Car's speed from greatest to least.
Answer to Problem 29A
D>B> C> E> A
Explanation of Solution
Introduction:
Speed is how fast or how slow the object is moving. It is a scalar quantity.
At point A, the car is at height so its speed is zero. When car comes to point B, its potential energy gets converted to kinetic energy. So, it comes to position B with high speed. At point B, its speed is high. Again, car goes to point C so its speed decreases and then car speed increases at point D. At point E the car finally reaches certain height by gaining potential energy. The height of point Eis less than point A.
Conclusion:
The ranking of car's speed from greatest to least is D, B, C, E, A.
(b)

To Rank: Car’s kinetic energy from greatest to least.
Answer to Problem 29A
D>B> C> E> A
Explanation of Solution
Introduction:
When an object is in motion, it possess the kinetic energy. Its SI unit is joules.
Kinetic energy of car depends on car's speed. As speed of car increases, kinetic energy increases. At high point car, has high potential energy and low kinetic energy. Here car's speed is high at point D and it decreases for point B, C, E, A.
Conclusion:
Ranking of car's kinetic energy from greatest to least is D, B, C, E, A.
(c)

To Rank:Car’s potential energy from greatest to least.
Answer to Problem 29A
A> E> C> B > D
Explanation of Solution
Introduction:
Potential energy is the energy possessed by the object due to its position. Potential energy is high if object position is high and low if object’s position is low.
Potential energy of car is proportional to car's height. Potential energy will be high for high car's position and low for low position.
Here car's position is measured from ground will be from highest to lowest will be A, E, C, B and D.
Conclusion:
Ranking of car's potential energy from greatest to least is A, E, C, B and D.
Chapter 9 Solutions
EP CONCEPTUAL PHYSICS-ONLINE ACCESS
Additional Science Textbook Solutions
Microbiology with Diseases by Body System (5th Edition)
Campbell Biology (11th Edition)
Cosmic Perspective Fundamentals
Campbell Biology in Focus (2nd Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
Chemistry: A Molecular Approach (4th Edition)
- 2. 1. Tube Rating Charts Name: Directions: For the given information state if the technique is safe or unsafe and why. 60 Hertz Stator Operation Effective Focal Spot Size- 0.6 mm Peak Kilovolts MA 2 150 140 130 120 110 100 90 80 70 2501 60 50 40 30 .01 .02 .04.06 .1 .2 .4.6 1 8 10 Maximum Exposure Time In Seconds Is an exposure of 80 kVp, 0.1 second and 200 mA within the limits of the single phase, 0.6 mm focal spot tube rating chart above? Is an exposure of 100 kVp, 0.9 second and 150 mA within the limits of the single phase, 0.6 mm focal spot tube rating chart above?arrow_forwardQ: You have a CO2 laser resonator (λ = 10.6 μm). It has two curved mirrors with R₁=10m, R2= 8m, and mirror separation /= 5m. Find: R2-10 m tl Z-O 12 R1-8 m 1. Confocal parameter. b= 21w2/2 =√1 (R1-1)(R2-1)(R1+R2-21)/R1+R2-21) 2. Beam waist at t₁ & t2- 3. Waist radius (wo). 4. 5. The radius of the laser beam outside the resonator and about 0.5m from R₂- Divergence angle. 6. Radius of curvature for phase front on the mirrors R₁ & R2-arrow_forwardNo chatgpt pls will upvotearrow_forward
- SARET CRKS AUTOWAY 12. A stone is dropped from the top of a cliff. It is seen to hit the ground below after 3.55 s. How high is the cliff? 13. A ball is dropped from rest at the top of a building that is 320 m tall. Assuming no air resistance, what is the speed of the ball just before it strikes the ground? 14. Estimate (a) how long it took King Kong to fall straight down from the top of the Empire State Building (280m high), and (b) his velocity just before "landing". Useful equations For Constant Velocity: V => D X = V₁t + Xo For Constant Acceleration: Vr = V + at X = Xo+Vot + v=V+2a(X-Xo) \prom = V +V V velocity t = time D Distance X = Final Position Xo Initial Position V = Final Velocity Vo Initial Velocity a = acceleration For free fall Yf = Final Position Yo Initial Position g = 9.80 m $2 For free fall: V = V + gt Y=Yo+Vo t + +gt V,² = V₁²+2g (Y-Yo) V+Vo Vprom= 2 6arrow_forwardSolve the problemsarrow_forwardA 11 kg weight is attached to a spring with constant k = 99 N/m and subjected to an external force F(t) =-704 sin(5t). The weight is initially displaced 4 meters above equilibrium and given an upward velocity of 5 m/s. Find its displacement for t> 0. y(t) וןarrow_forward
- 7. A race car accelerates from rest to 55 m s-1 in 5.0 seconds. The acceleration of the car Is m s-² 8. An object's speed increases uniformly from 10.5 km per hour to 99.8 km per hour in 2.41 seconds. Calculate the acceleration in m s-2 and express your answer to three significant figures. 9. The acceleration-time graph of a car is shown below. The initial speed of the car is 5.0 m s-1. # Acceleration (ms) 12 8.0- 4.0- 2.0 4.0 6.0 Time (s) Calculate the velocity of the car at t = 4.0 s. 3arrow_forwardNo chatgpt pls will upvotearrow_forwardNo chatgpt pls will upvotearrow_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





