College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Topic Video
Question
a.) A student is riding a bicycle at a constant speed of 6.0 m/s on a level road. The mass of the student and bicycle together is 80 kg. Assume the friction and drag is 35 N. What is the student's output power, in Watts?
b.) A student is riding a bicycle at a constant speed of 6.0 m/s on a 7.0º hill. The mass of the student and bicycle together is 80 kg. Assume the friction and drag is 35 N. What is the student's output power, in Watts?
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A 355.0 g block is dropped onto a vertical spring with a spring constant k = 276.0 N/m. The block becomes attached to the spring, and the spring compresses 0.25 m before momentarily stopping. В www While the spring is being compressed, what work is done by the block's weight? ? What work is done by the spring? ? What was the speed of the block just before it hit the spring? ?arrow_forwardYou push a file cabinet up a frictionless ramp tilted at 10°with horizontal. The file cabinet has a mass of 100 kg and you are pushing with a 700 N force in the direction up along the ramp. The file cabinet has initial speed of 2.0 m/s. It's moved 8.0 m up along the ramp. Match the answers with questions. 10.0° + the initial kinetic energy of the cabinet (Kj) A. O J + the final kinetic energy of the cabinet (Kf) В. 4208 J the change in kinetic energy of the cabinet (AK) С. 4408 J D. 4008 J Е. 200 J F. -200 J G. -4408 J H.-4008 J I. -4208 Jarrow_forwardA grocery cart with a mass of 10 kg is being pushed at constant speed up a 25° ramp by a force Fp which acts parallel to the incline. (Ignore the friction) a. Draw a free-body diagram of the cart showing all the forces acting on it. b. Find the work done by each of the forces (W, Fn, Fp) on the cart if the ramp is 7.5 m long. Hints: The question is very similar to the question of a piano sliding down an incline discussed in class. However, here the object is pushed up the incline. The forces Fn = mgcos(0), and Fp = mgsin(0), so don't spend time getting these using Newton's 2nd law. Also, the weight is W = mg. c. Find the net work done on the cart.arrow_forward
- Do not use Ug=mgh. Pleasearrow_forwardAfter pushing a 27.8 kg kid and tricycle over 8.2 m of smooth, level sidewalk from rest, the "combo" is moving at 3.8 m/s. Find the combo's kinetic energy. Submit Answer Tries 0/10 And, what net force must have been delivered to the combo? Submit Answer Tries 0/10 Now you stop pushing and let the combo coast to a stop. The only force stopping the combo is the force of friction. If the force of friction is 6.9 N, how far will the combo coast before it stops? Submit Answer Tries 0/10arrow_forwardACTIVITY 1 Problem Solving Power Rating Power is the rate of doing work. Power depends on the amount of work done in a specific time. It is measure in joules/second or watts which is the SI unit. Horsepower often used in measuring power of machines but is not an SI unit. One horsepower is equivalent to 750 watts. Read, analyze, and solve the following problems using the GUFSA template. Show your complete solution. Round off your final answer to the nearest hundredths. 1. A piano mover pushes a piano with a force of 200 N, moving it 12 m in 15 s. With how much power does the piano mover need to push?arrow_forward
- 6. Please answerarrow_forwardA 70.5-kg hiker starts at an elevation of 1260 m and climbs to the top of a peak 2800 m high. a.)What is the hiker's change in potential energy? Express your answer to three significant figures and include the appropriate units. b.)What is the minimum work required of the hiker? Express your answer to three significant figures and include the appropriate units.arrow_forward4. A 2.0 kg box slides down a ramp a distance of 3.0 meters before it reaches the ground. The ramp has an angle of 35°, and the force of kinetic friction if 4.0 N. a) What is the work done by gravity on the box? (include a FBD) b) What is the speed of the box at the bottom of the ramp?arrow_forward
- Draw a sketch and also a FBD to identify the relevant forces doing work. A football player pushes a tackling dummy forwards at a constant 0.85 m/s for 11m using 7150 J of energy. The tackling dummy has a mass of 120 kg. a) Find the force of the football player exerts. b) Draw a FBD of the dummy. Be sure to include friction in the diagram. What is the value of this friction force? c) How many joules of work has been done by friction? d) Is the mass necessary for this question? Explain.arrow_forwardA 101-kg man is skiing across level ground at a speed of 9.5 m/s when he comes to the small slope 1.8 m higher than ground level shown in the following figure. a. If the skier coasts up the hill, what is his speed when he reaches the top plateau? Assume friction between the snow and skis is negligible. b. What is his speed when he reaches the upper level if an 80-N frictional force acts on the skis?arrow_forward39 A 1.00 kg block slides down a 20.0 meter ramp at a constant velocity. The angle of inclination of the ramp is 30°. How much work is done by friction? Ans. 98.0 J 45. A car pulls a trailer with a force of 2000 N at 20.0 m/s. What is the Ans. 4.00 x 104 Watts power exerted?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- 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
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON