Please explain this to me in depth and step by step in the clearest way possible. I am very confused. c. Write down an equation for the work done by friction, a non-conservative force. Express the work usingW, and define this using fк = μкn, d and the angle 0.Ws = (fid.cose) + (f₁d₂ (058) = -fid. - Fzdz:*f: Mun, uk mg cosoЎго мииг емитуWS = - MK my cosсого)-MK myseWf--ukmgl - Mking xd. Write down an equation for the work done by friction using the work-energy theorem, setting WAME. Express AME in terms of its kinetic and potential energies.WS = AME = (KEF-ws: ½ mv²²-mgh:wfmgd, SingWf=-mg singCos Obn70P/(5) - (1/E2 - PE;)d,cose=-mg & Tang=

Concepts Involved:Electromagnetic Radiation (Light): Light is a form of energy that travels as…

Answered: c. Write down an equation for the work…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter9: Energy In Nonisolated Systems

Section: Chapter Questions

Problem 32PQ

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(a) What is the efficiency of an out-of-condition professor who does 2.10105J of useful work while metabolizing 500 kcal of food energy? (b) How many food calories would a well-conditioned athlete metabolize in doing the same work with an efficiency of 20%?
(a) Calculate the work done on a 1500-kg elevator car by its cable to lift it 40.0 m at constant speed, assuming friction averages 100 N. (b) What is the work done on the lift by the gravitational force in this process? (c) What is the total work done on the lift?
a) The acceleration of a 5.0 kg box is 2.5 ms?. when a horizontal force is applied across a surface having a coefficient of friction of 0.5, as shown in Figure 3. a = 2.5 ms-2 7 kg Hk = 0.5 Figure 3 Find the work done over a distance of 25 cm by ix. the horizontal force the frictional force, and Х. xi. the net force. xi. what is the change in kinetic energy of the box?
Suppose a force of 60 N is required to stretch and hold a spring 0.1 m from its equilibrium position. a. Assuming the spring obeys Hooke's law, find the spring constant k. b. How much work is required to compress the spring 0.6 m from its equilibrium position? c. How much work is required to stretch the spring 0.2 m from its equilibrium position? d. How much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. k= (Type an integer or a decimal.) b. Set up the integral that gives the work done in compressing the spring 0.6 m from its equilibrium position. Use decreasing limits of integration. (Type exact answers.) Find the work done in compressing the spring. The work is (Type an integer or a decimal.) c. Set up the integral that gives the work done in stretching the spring 0.2 m from its equilibrium position. Use increasing limits of integration. dx (Type exact answers.) Find the work done in stretching the spring. The…
Question: 1. Suppose that the elevator is broken in the building n which you work and you have to climb 9 stories. -a height of 45m above ground level. How many extra calories will this external work cost you if your mass is 70 kg and your body work at 15% efficiency? 2. A 70 kg hiker climbed a mountain 1000 m high. He reached the peak in 3 hr. A. Calculate the external work done by the climber. B. Assuming the work was done at a steady rate during the 3 hr period. Calculate the power generated durir the climb. C. Assuming the average O, consumption during he climb was 2 liters/min (corresponding to 9.6 kcal/min), find the efficiency of the hiker's body. D. How much energy appeared as heat in the body?
Please answer the foITO 1. T Calculate the work done from x=0 to x = 7 m by the one-dimensional force depicted in the following graph. Suppose that Fo = 68N, calculate the total work by the force over 7 m. % 5 Fo -Fo W= Search 16 1 6 2 17 & 3 Q+ 7 4 5 * 90 Q 6 7 ।ব x (m) f10 >II fn DDI f12 849
The work performed as a function of time for a certain process is given by: W = at³, where a = 2 J/s³. The instantaneous power output (measured in Watts) at t = 2 sec is: А. 24 В. 69 С. 54 D. 207 E. 6
Are the following dimensionally homogeneous (these may not represent practical physical quantities)? A: B: P.t E F V P = power t = time E = energy A = area F = force = V = volume W = work = t A W. A² a. A and B b. A only O c. B only t Od. Neither A nor B
The work performed as a function of time for a certain process is given by: W = at³, where a = 2 J/s³. The instantaneous power output (measured in Watts) at t = 1 sec is: А. 24 В. 69 С. 54 D. 207 Е. 6
Dot. What is the scalar product Ã· BifÃ = x² + yĵ and B = yî − xĵ? O A. 2xy OB. x² - y² o c. xyi - yx) O D. zero Work. Which of the following is the correct general expression for the work done by a constant force Fof magnitude F on an object of mass m which undergoes a displacement d with magnitude d? O A. Fd OB. mgd OC. F- mg OD. F.d
What is the difference between when work is done by a system and when work is done on a system? a. Work done on a system causes an increase in the energy of the system. O b. Work done by a system causes an increase in the energy of the system. O c. С. None of them makes ay difference in the energy of the system.
Refer to this situationAn object is moved along a horizontal surface by a force applied at somw degrees from the horizontal. The force that does the negative work on the object is _____a. Frictionb.Force of gravityc.Vertical component of the applied force The force that does no work on the object ______a. frictionb.force of the gravityc.the applied of gravityd.horizontal conponent of the applied force if a big person and small person run up the stairs at the same time, which of them does greater work?a. small personb.big personc.both of themd.insufficient data if the sign of work is negative ____a. the force is in the same direction as the displacementb.the force is perpendicular to the displacementc.the component of the force that does work is in the direction opposite the displacementd.the component of the force that does work is perpendicular to the displacement

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