Read and Solve the following problems.W- Fa cos 01. How much work is done on the lawn mower by the person inFigure(a) if he exerts a constant force of 80.0N at an angle 38°below the horizontal and pushes the mower 30.0m on levelFcoseground?

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Answered: ad and Solve the following problems. W…

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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A block of mass 2.00 kg is pushed 3.00 m along a frictionless horizontal table by a constant 17.0N force directed 27.0° below the horizontal. Determine the work done by 1. the normal force exerted by the table 2. the force of gravity 3. Solve the total work done on the block.
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1a. A student does 125.0 J of work lifting a 12.0 kg book. How high was the book lifted? 1b.The book from problem 1 is then allowed to slide down a straight ramp which makesa 26.0o angle above the horizontal, and the book reaches its original position at the endof this ramp. How fast would it be going if there was no friction?
3. To push a 44 kg box across the floor at constant speed, a worker applies a force of 190 N, directed 22º below the horizontal. If the box moves 3.8 m, how much work do: a) the worker, b) the force of gravity, and c) the friction force do on the box?
Q16. A constant force of (12hat i N acts on a 4.0-kg object as it moves from the origin to the point (6hat i -8 hat j )m. How much work is done by the given force during this displacement?
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?
A man pulls a 100 N box using a rope oriented at an angle of 30˚ with the horizontal force on a rough floor that exerts 8N frictional force on the box. Suppose the box has moved a distance of 10m to the right. Find the work done by each force acting on the box. What is the net work done on the box? a. 786 J b. 870 J c. 946 J d. 1080 J
A child pulls a wagon 5.0 m using a force of 25 N at an angle 15 degrees above horizontal. The force of friction on the wagon is 8.1 N. Calculate the work done on the wagon in the horizontal direction. a. 6.5 J b. 24.1 J c. 32.5 J d. 80 J e. 84.5 J f. 125.1 J g. 125 J h. don't be silly, you can't calculate the net work without the change in KE!!
A 65.0-kg file cabinet of is sliding down a rough ramp for a distance of 5.00 m as shown. The friction force on the box is 75.0 N. During this process, what is the work done on the cabinet by its own weight, in Joule? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
Suppose a car approaches a hill and has an initial speed of 106 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill. a. If the car has the initial speed stated at a height of h = 0, how high, in meters, can the car coast up a hill if work done by friction is negligible? b. If, in actuality, a 750-kg car with an initial speed of 106 km/h is observed to coast up a hill and stops at a height 21.5 m above its starting point, how much thermal energy was generated by friction in J? c. What is the magnitude of the average force of friction, in newtons, if the hill has a slope 2.1° above the horizontal?
A 65.0-kg file cabinet of is sliding down a rough ramp for a distance of 5.00 m as shown. The friction force on the box is 75.0 N. During this process, what is the work done on the cabinet by the normal force, in Joule? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.

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ad and Solve the following problems. W Facoso 1. How much work is done on the lawn mower by the person in Figure(a) if he exerts a constant force of 80.0N at an angle 38° below the horizontal and pushes the mower 30.0m on level ground?