A) Give a general expression for the work done by two forces acting on an object...
A) Give a general expression for the work done by two forces acting on an object (F1 and F2 vectors) as it moves along a trajectory. F1 is conservative, and F2 is dissipative. Your expression should include terms of kinetic and potential energies, if any, indexed during the forces. B) Define the Total Mechanical Energy C) How does it change?
Homework Answers
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A) Give a general expression for the work done by two forces
acting on an object...
The mechanical energy of an object must change if: The object's kinetic energy is changing There...
The mechanical energy of an object must change if: The object's kinetic energy is changing There is a net non-conservative force acting on the object over some distance More than one non-conservative forces are acting on the object All forces acting on the object are conservative The kinetic and potential energies of the object are changing in opposite ways
Calculate the work WAB done by the electrostatic force on a particle of charge q as...
Calculate the work WAB done by the electrostatic force on a
particle of charge q as it moves from A to B. Express your answer
in terms of some or all the variables E, q, L, and ?.
Constants Learning Goal: To review the concept of conservative forces and to understand that electrostatic forces are, in fact, conservative. Calculate the work WAB done by the electrostatic force on a particle of charge q as it moves from A to B....
Work Done by the Govtational Force bute the gravitational force G m./r into the integral equation...
Work Done by the Govtational Force bute the gravitational force G m./r into the integral equation on the previous genith Y replacing and find the work done by this force df w is the work done by the gravitational for moves away from t he gravitational force positive, negative, or zero when an object in the Earth? When it moves toward the Earth? When it orbits the Earth in a circle? Part B: Conservative and Non-conservative Forces welop and understorence...
Give examples of : (a) two conservative forces, and (b) as many (but at least 3)...
Give examples of : (a) two conservative forces, and (b) as many (but at least 3) non-conservative forces as you can think of. For each example of the conservative force, give the expression for the potential energy associated with the conservative force. For each example of a non-conservative force, give a situation where non-conservative force changes the total mechanical energy of a system.
The object below, with mass M is pulled in the horizontal direction over a flat surface...
The object below, with mass M is pulled in the horizontal
direction over a flat surface for a distance d, whose coefficient
of friction is uk.
2. The object below, with mass Mis pulled in the horizontal direction over a flat surface for a distance d, whose coefficient offriction is HK a. (5 points What is the total work done by friction? b. (5 points What is the change in thermal energy? 3. (5 points If both conservative forces and...
An object, which is initially at rest on a frictionless horizontal surface, is acted upon by...
An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four constant forces F1 is 11.1 N acting due East, F2 is 28.6 N acting due North, F3 is 43.5 N acting due West, and F4 is 20.7 N acting due South. How much total work is done on the object in 3.33 seconds, if it has a mass of 18.0 kg? Number Units Which type of energy is changing for the object while...
An object, which is initially at rest on a frictionless horizontal surface, is acted upon by...
An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four constant forces F1 is 14.6 N acting due East, F2 is 28.6 N acting due North, F3 is 52.1 N acting due West, and F4 is 17.4 N acting due South. How much total work is done on the object in 2.22 seconds, if it has a mass of 14.0 kg? Number Units Which type of energy is changing for the object while...
Due Date: 11-21-19 Name: Jcninct pour Activity 7.3 Work Done by Common Forces, Conservative and Non-conservative...
Due Date: 11-21-19 Name: Jcninct pour Activity 7.3 Work Done by Common Forces, Conservative and Non-conservative Forces, Potential and Internal Energy, and the Conservation of Energy 20 Points Text Reference: Ch.7.4-7.7.8.1-8.4.13.6 Part A: Work Done by Common Forces Discussion In this section, the goal is not to find numerical values for the work done by common forces, but to obtain simplified expressions for this work. Often, the magnitudes and directions or components of these common forces are known and unvarying...
Work Done by Normal Force Consider an object sliding along the surface shown below. Choose and...
Work Done by Normal Force Consider an object sliding along the surface shown below. Choose and show a direction of motion for the object and show the direction of the normal force. Use this figure to do the scalar product given below. oM bns av W, n-s Is the work done by the normal force exerted between two colliding objects also zero? Explain. Work Done by Weight Unlike the normal and kinetic friction forces, the direction of an object's motion...
The pendulum shown to the left consists of a bob of mass of 0.44 kg, attached...
The pendulum shown to the left consists of a bob of mass of 0.44
kg, attached to a string of length L = 1.2 meters. It is
moving to the right with a speed of 4.62 m/sec at point A. What
we'd like to know is what the the velocity of the bob when it
reaches point B which is 36 degrees from vertical.
There are two different ways to look at this problem, each of
which will give us...
Calculate the work WAB done by the electrostatic force on a
particle of charge q as it moves from A to B. Express your answer
in terms of some or all the variables E, q, L, and ?.
Constants Learning Goal: To review the concept of conservative forces and to understand that electrostatic forces are, in fact, conservative. Calculate the work WAB done by the electrostatic force on a particle of charge q as it moves from A to B....
Work Done by the Govtational Force bute the gravitational force G m./r into the integral equation on the previous genith Y replacing and find the work done by this force df w is the work done by the gravitational for moves away from t he gravitational force positive, negative, or zero when an object in the Earth? When it moves toward the Earth? When it orbits the Earth in a circle? Part B: Conservative and Non-conservative Forces welop and understorence...
The object below, with mass M is pulled in the horizontal
direction over a flat surface for a distance d, whose coefficient
of friction is uk.
2. The object below, with mass Mis pulled in the horizontal direction over a flat surface for a distance d, whose coefficient offriction is HK a. (5 points What is the total work done by friction? b. (5 points What is the change in thermal energy? 3. (5 points If both conservative forces and...
An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four constant forces F1 is 11.1 N acting due East, F2 is 28.6 N acting due North, F3 is 43.5 N acting due West, and F4 is 20.7 N acting due South. How much total work is done on the object in 3.33 seconds, if it has a mass of 18.0 kg? Number Units Which type of energy is changing for the object while...
An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four constant forces F1 is 14.6 N acting due East, F2 is 28.6 N acting due North, F3 is 52.1 N acting due West, and F4 is 17.4 N acting due South. How much total work is done on the object in 2.22 seconds, if it has a mass of 14.0 kg? Number Units Which type of energy is changing for the object while...
Due Date: 11-21-19 Name: Jcninct pour Activity 7.3 Work Done by Common Forces, Conservative and Non-conservative Forces, Potential and Internal Energy, and the Conservation of Energy 20 Points Text Reference: Ch.7.4-7.7.8.1-8.4.13.6 Part A: Work Done by Common Forces Discussion In this section, the goal is not to find numerical values for the work done by common forces, but to obtain simplified expressions for this work. Often, the magnitudes and directions or components of these common forces are known and unvarying...
Work Done by Normal Force Consider an object sliding along the surface shown below. Choose and show a direction of motion for the object and show the direction of the normal force. Use this figure to do the scalar product given below. oM bns av W, n-s Is the work done by the normal force exerted between two colliding objects also zero? Explain. Work Done by Weight Unlike the normal and kinetic friction forces, the direction of an object's motion...
The pendulum shown to the left consists of a bob of mass of 0.44
kg, attached to a string of length L = 1.2 meters. It is
moving to the right with a speed of 4.62 m/sec at point A. What
we'd like to know is what the the velocity of the bob when it
reaches point B which is 36 degrees from vertical.
There are two different ways to look at this problem, each of
which will give us...
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