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Introduction: Different forms of the forces acting on the system. Depending on the nature of the…

Answered: QUESTION 10 forces are forces that do…

QUESTION 10 forces are forces that do work without any change in mechanical energy. QUESTION 11 The SI unit of average power is joule/sec or

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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5. Two people of the same mass climb the same set of stairs. Person A climbs the stairs in 25 s. Person B climb the stairs in 35 s. a. Which person does the most work? Explain your answer b. Which person produces more power ? Explain your answer
Please answer this question in detail, Don't use chatgpt.
5. Joseph sweeps his sidewalk with a broom. Joseph performs 42 Joules of work pushing dead leaves with the broom with a force of 18 N. Calculate the distance that Joseph pushed the dead leaves. Report your answer in meters. 6. A tractor pulls a hay wagon with a force of 430 N. The tractor performs 760,000 Joules of work. Calculate the distance that the tractor pulled the wagon. Report your answer in meters. 7. A tractor pulls a hay wagon a distance of 1300 meters. The tractor performed 260,000 Joules of work. Calculate the force that the tractor used to pull the wagon. Report your answers in Newtons.
A force, varying with distance as shown in the graph below, acts on a 5.5 kg object. When is most work done, in the first 4 meters or between 4 and 6 meters? Explain your response. 4.0 3.0 2.0 1.0 2.0 4.0 6.0 8.0 Find the work done by the force in moving the object from 0 m to 6.0 m. Explain your calculation and give units. Figure 9-15 C. Assuming that there is no friction or air resistance what is the total change in the object's energy? Explain your answer. b. FORCE (N)
Power of the Human Heart. The human heart is a powerful and extremely reliable pump. Each day it takes in and discharges about 7500 L of blood. Assume that the work done by the heart is equal to the work required to lift this amount of blood a height equal to 1.5 m. The density (mass per unit volume) of blood is 1050 kg/m3 . What is the heart's power output. Use g = 9.8m/s2 Calculate answer to one decimal.
Which of the statements below is true when you catch a baseball that comes at you horizontally? a. The work that you do is positive. b. The work that you do is negative. c. Work is not a vector and cannot be referred to as positive or negative. d. Work is a scalar product expressed in terms of magnitudes, so it is never negative. e. Work is expressed in terms of kinetic energy, which must be positive.
The brakes of a truck cause it to slow down by applying a retarding force of 7680 N to the truck over a distance of 760 m. What is the work done by this force on the truck? Number Units
Question 1 The first question does not require the coefficient of friction. Doesn't all the work being performed by the system = friction? Friction is the only thing that is performing work?
7. A 1650 kg car accelerates up a hill by applying a force of 4.61 × 10³ N parallel to the hill. The hill is at an incline of 13°. m 2016 d = 17 m 13° A. What is the net work done on the car as it travels 17 m up the hill? (Hint: calculate the work done by each force in the system. There are 3 forces. The net work is the sum of the works done by each individual force.) b. What is the change in kinetic energy for the car? at the bottom of the hill. How fast is it moving at the top The car is travelling at a speed of 16 of the hill? I= c) 74°F
You lift your backpack from the ground and moved forward to your car. Which of the following statements is true? A. Work is done on the backpack while lifting it and moving it forward. B. Work is done on the backpack while lifting it and but not when moving it forward. C. No work is done on the backpack while lifting it but work is done on it when moving it forward. D. No work is done on the backpack at all.
2. Mikey sees that the right front tire (m 30.0 kg) of Granny's car has landed in front of him. He picks it up and runs for 40 m at a constant velocity of 2.0 m/s to return it to her. How much work did Mikey do on the tire from 10 m to 20 m into his run? =
Which of the following statements are true? Select all correct. Question 3 options: If an object speeds up, then the total work done on the object was positive. If an object moves at a constant speed, then the work done by each individual force is zero A force must be parallel to the displacement to do any work. If a force is perpendicular to displacement, it does zero work. If a force has a component in the opposite direction of the displacement, it does positive work. If an object doesn't move, then the work done by every individual force must be zero.