(c) The work done by friction isO positive.O negative.(d) Find her final speed at the top.Enter to 3 significant figuresV=m/s O yesKE₁(a) Is mechanical energy conserved in this problem?noV₁A 70.0-kg skier with an initial speed of 10.0 m/s coasts up a 2.50-m-high rise as shown in the figure.The coefficient of friction between her skis and the snow is 0.070. Hint: find the distance traveled upthe incline assuming a straight-line path as shown in the figure.Think & Prepare1. Make note of what's given and what's unknown. Relate known quantities to symbols.2. Draw a labeled sketch if possible.3. Identify the physics principle and approach. Write down relevant equations symbolically. Simplify ifpossible.4. Insert numerical quantities to solve for unknowns.5. Does the answer make sense?zero(b) The change in mechanical energy equalswork done by friction.35°V₁ = ?2.5 mO increase in PE.Use (b) to set-up a mathematical equation between change in mechanical energy and work doneby friction(c) The work done by friction is

Name: (c) The work done by friction isO positive.O negative.(d) Find her fi
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: (c) The work done by friction isO positive.O negative.(d) Find her final speed at the top.Enter to 3 significant figuresV=m/s O yesKE₁(a) Is mechanical energy conserved in this problem?noV₁A 70.0-kg skier with an initial speed of 10.0 m/s coasts up

Answered: Image /qna-images/answer/318de113-f6f9-4be4-9909-4293f95c0355.jpg

Science

Physics

(c) The work done by friction is O positive. O negative.

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 41P: (a) A child slides down a water slide at an amusement park from an initial height h. The slide can...

See similar textbooks

Similar questions

In an iconic movie scene, Forrest Gump (https://openstaxcollege.org/l/21ForrGumpvid) runs around the country. If he is running at a constant speed of 3 m/s, would it take him more or less energy to run uphill or downhill and why?
(a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) to reach a speed of 15.0 m/s, neglecting friction? (b) How long will this acceleration take if the car also climbs a 3.00-m-high hill in the process?
(a) What is the average useful power output of a person who does 6.00106J of useful work in 8.00 h? (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)
An electric scooter has a battery capable of supplying 120 Wh of energy. If friction forces and other losses account for 60.0% of the energy usage, what altitude change can a rider achieve when driving in hilly ter-rain if the rider and scooter have a combined weight of 890 N?
A 6.50 102-kg elevator starts from rest and moves upward for 3.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this amount of power compare with its power during an upward trip with constant speed?
“ E=K+Uconstant is a special case of the work energy theorem.” Discuss this statement.
A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time: (a) How many people ‘would it take to nm a 4.O0-kW electric clothes dryer? (b) How many people would it take to replace a large electric power plant that generates 800 MW?
An archer pulls her bowstring back 0.400 m by exerting a force that increases uniformly from zero to 230 N. (a) What is the equivalent spring constant of the bow? (b) How much work does the archer do on the string in drawing the bow?
Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.00 slope at constant speed, as shown below. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done by fiction as the sled moves 30.0 m along the hill? (b) How much work is done by the rope on the sled in this distance? (c) What is the work done by the gravitational force on the sled? (d) What is the total work done?
A sled stalls from rest at the top of a snow-covered incline that makes a 22 angle with the horizontal. After sliding 75 m down the slope, its speed is 14 m/s. Use the work-energy theorem to calculate the coefficient of kinetic friction between the runners of the sled and the snowy surface.
A man of mass 80 kg runs up a flight of stairs 20 m high in 10 s. (a) how much power is used to lift the man?(b) If the man’s body is 25 efficient, how much power does he expend?
(a) What is the power output in watts and horsepower of a 70.0-kg sprinter who accelerates from rest to 10.0 m/s in 3.00 s? (b) Considering the amount of power generated, do you think a well-trained athlete could do this repetitively for long periods of time?