SolutionFdPower =Power =(14700N)(14m)Big Idea600sPower = 343 wattshave more power, then you are able to do more work. Thus, having moreyouAn 80 kg man walks up a 50 m plank which is inclined 30° with the horizontal, in4 minutes. Calculate the power of the man.A 1.5 hp air conditioner was used to cool a room for 2 hours. Find the amount ofwork done by the air conditioner.Solution:

Answered: What Have An 80 kg man walks up a 50 m…

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)...

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QUESTION 6 A falling package with a parachute is greatly affected by air resistance. Suppose a package (m 25 kg), dropped from an altitude of y = 1500 m, hits the ground at a speed of v = 45 m/s. Calculate the work done by air resistance. By conservation of energy, the initial total mechanical energy is equal to the final total mechanical energy. Let K be the kinetic energy, U be the gravitational potential energy, and Wair be the work done by the drag force from air resistance.
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A small block of mass 200 g starts at rest at A and slides along a curved frictionless track surface to B, then slides along the horizontal surface a distance 10 m before coming to rest at C due to friction between B and C. Find its speed at B and the work done by friction along the horizontal surface from B to C. 4.0 m B -10 m-
A cart for hauling ore out of a gold mine has a mass of 443 kg, including its load. The cart runs along a straight stretch of track that climbs a shallow 4.01° incline. Track -.Rope A Track incline Horizontal ground Find the work Wa that the donkey performs on the cart during this process. Find the work Wg that the force of gravity performs on the cart during this process. Calculate the work Wf done on the cart by friction during this process. A donkey, which is trudging along and to the side of the track, has the unenviable job of pulling the cart up the slope with a 389 N force for a distance of 157 m by means of a rope that is parallel to the slope but makes an angle of 13.5° with the track. Model the rolling resistance of the cart as though it were sliding on the track with a coefficient of friction of 0.0171. Use g = 9.81 m/s², and note that angle A in the image is the angle of the incline while angle B is the angle the rope makes with the track. Wa = J J W% = W₤ = J
A 100 kg block is pulled at a constant speed of 5 m/s across a horizontal force by an applied force of 122 N directed 37^o above the horizontal. The rate at which the force does work on the block is ____. a. 810 Watts b. 490 Watts c. 530 Watts d. 704 Watt
Google Drive A sled plus passenger with total mass 58 kg is pulled by an applied force 15 m across the snow (k = 0.25) at a constant velocity by a force directed 25° above the horizontal. Assume the snow is level (horizontal). a. Calculate the work of the applied force J Wapp b. Calculate the work of friction Wf c. Calculate the total work J W total ____ Question Help: Submit Question Read 1 TC Mint 2 Read 2
For locations that have no electric service, companies are designing bicycle-powered generators that are nearly 100% efficient that can be used to charge cell phones or power lights. If you are the person chosen to pedal and your friends need a total of 150 W of electric power, how much metabolic powerwill you use as you pedal?A. 150 W B. 300 W C. 450 W D. 600 W
Explain the difference between work and energy.
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A 25kg wagon is pulled by Bill with an applied force of 40N (29 degrees above the horizontal). The force of friction is constant 15N. If the wagon is pulled 15m. Calculate a. The work done by Bill. b. The work done by friction c. The net work.
2. A 5.2-kg box slides a distance of 16.0-m. If the coefficient of kinetic friction is 0.30, what is the work done by the frictio" 6 d x244.64 J ✓cci 6 ccilo 16 cci16 ceiz
1. A student of mass 40 kg caries a bag weighing 5000g from the ground floor to his class on the first floor that is 700 cm high. The work done by the boy is = 2. The above diagram shows a cyclist at different positions as she cycles over a humpback bridge. The cyclist has maximum Kinetic Energy at • and maximum Potential energy at 3. A body moves a distance of 15 m along a straight line under the action of 25 N force. If work done is 45 J, then angle between the force and direction of motion of the body will be = 4. How much is the work done in pulling up a block of wood weighing 300 N for a length of 300 cm on a smooth plane inclined at an angle of 35° with the horizontal? Answer =

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What Have An 80 kg man walks up a 50 m plank which is inclined 30° with the horizontal, in 4 minutes. Calculate the power of the man. 2A 1.5 hp air conditioner was used to cool a room for 2 hours. Find the amount of work done by the air conditioner.