A 54.0-kg skateboarder starts out with a speed of 1.70 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The final speed of the skateboarder is 6.00 m/s. (a) Calculate the change (APE = PEf- PEO) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Is the skater above or below the starting point? O above the starting point O below the starting point Additional Materials eBook

A 54.0-kg skateboarder starts out with a speed of 1.70 m/s. He does +80.0 J of work on himself by pushing with his feet against the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work are nonconservative. The final speed of the skateboarder is 6.00 m/s. (a) Calculate the change (APE = PEf- PEO) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Is the skater above or below the starting point? O above the starting point O below the starting point Additional Materials eBook

Name: A 54.0-kg skateboarder starts out with a speed of 1.70 m/s. He does +
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: A 54.0-kg skateboarder starts out with a speed of 1.70 m/s. He does +80.0 J of work on himself by pushing with his feetagainst the ground. In addition, friction does -265 J of work on him. In both cases, the forces doing the work arenonconservative.

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)...

See similar textbooks

Similar questions

A car with mass 1520 kg is traveling down the highway at a speed of 18 m/s when the driver slams on the brakes due to an accident up ahead. The car eventually comes to rest.According to the work-energy theorem the work is related to the change in kinetic energy, Wnet = Δ KE = KEfinal - KEinitial.(a) Using the work-energy relationship, determine how much net work is done on the car from the brakes? Report the magnitude of the the work (positive value) even though the work from brakes will be negative since the car is slowing down._____ J(b) The brakes apply a force of 24000 N to the car in order to make it stop. Using the fact that W = F d and the fact that the you found the work done (magnitude) by the brakes in part (b), determine the stopping distance, d, of the car.____ m
As an object moves from point A to point B only two forces act on it: one force is nonconservative and does -40 J of work, the other force is conservative and does -60 J of work. Between A and B, O A. the potential energy of object increases, mechanical energy increases O B. the potential energy of object decreases, mechanical eneray increases O C. the potential energy of object decreases, mechanical eñey decreases the potential energy of object increases, mechanical energy decreases
A box of mass 12955 kg is pulled from rest up a 15.5 m long incline that makes an angle of 25.0° with the horizontal. At the top of the incline, the speed of the box is 3.35 m/s. What is the work done by the pulling force? (neglect friction.).
Juan, Jose, and Jokoy are pushing a table with a constant 579 N force. Juan is pushing the table eastward whileJose is pushing northward. Jokoy is pushing in the 79° north of east direction. If the table moves 7 meters alongeast, how many joules of total work are exerted by the three men. Input the value only; do not include the units.
A four-horse carriage is accelerating by 6 m/s every three (3) seconds, carrying a total load (including the carriage, the coach man, and the passengers) of 275 kg. If the carriage is traveling for 50 meters along the dirt highway, whose friction value is known to be 451 N. (Note that 1hp = 746W, and in unit Watt=Joule/sec.) 1. How much work does the four-horse carriage exerted? (Unit in Joule) 2. How many seconds does the four-horse carriage had to attain the power necessary for work? (Unit in second) 3. How much kinetic energy does the carriage possess? (Unit in Joule)
A 97.5-kg man pushes a crate 4.5 m up along a ramp that makes an angle of 17.5° with the horizontal. He exerts a force of 495 N on the crate parallel to the ramp and moves it at a constant speed. Calculate the work, in joules, that the man performs to cause the crate and himself to move up the ramp.
A 58.1-kg skateboarder starts out with a speed of 2.03 m/s. He does 108 J of work on himself by pushing with his feet against the ground. In addition, friction does -243 J of work on him. In both cases, the forces doing the work are non-conservative. The final speed of the skateboarder is 7.89 m/s. (a) Calculate the change (PEf - PE0) in the gravitational potential energy. (b) How much has the vertical height of the skater changed? Give the absolute value.
A mechanic pushes a 3850 kg car from rest to a speed of v, doing 5083 J of work in the process. Find the speed v. Neglect friction between car and road. Answer in units of m/s.
A fuel-powered loader raises a 2.2 x 103-kg load from the ground to a loading platform, which is 2.7 m above the ground. Theloader consumes 1.5 X 105 J of energy from the fuel while raising the load. (a) Determine the work done by the loader on theload. (b) Calculate the efficiency of the loader.
A box with a mass of 5.5 kilograms moved a distance of 6m to the right. A tension of 63 Newtons by a rope was used to pull it and the angle with respect to the horizontal axis is 33.5 degrees. The coefficient of kinetic friction is 0.23. What is the total work done? A 240.83 Joules В 288.78 Joules 275. 23 Joules D) 255.67 Joules
The (non-conservative) force propelling a 1.40 x 103-kg car up a mountain road does 6.90 x 106 J of work on the car. The car starts from rest at sea level and has a speed of 28.0 m/s at an altitude of 2.40 x 102 m above sea level. Obtain the work done on the car by the combined forces of friction and air resistance, both of which are non-conservative forces. Number Units
A horizontal force of magnitude 35.9 N pushes a block of mass 4.07 kg across a floor where the coefficient of kinetic friction is 0.552. (a) How much work is done by that applied force on the block-floor system when the block slides through a displacement of 3.46 m across the floor? (b) During that displacement, the thermal energy of the block increases by 40.2 J. What is the increase in thermal energy of the floor? (c) What is the increase in the kinetic energy of the block? (a) Number i (b) Number i (c) Number i ! Units J ! Units Units