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PHYSICS 1A03 Lecture Notes - Lecture 13: Conservative Force, Kinetic Energy, Farad

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Verified Note
greenmacaw160
19 Oct 2018
School
McMaster University
Department
Physics
Course
PHYSICS 1A03
Professor
S. Cormier, K. Dalnoki-Veress

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PHYSICS 1A03 verified notes
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10

PHYSICS 1A03 Lecture Notes - Lecture 10: Friction

13

PHYSICS 1A03 Lecture Notes - Lecture 13: Conservative Force, Kinetic Energy, Farad

14

PHYSICS 1A03 Lecture Notes - Lecture 14: Gravitational Energy, Conservative Force, Elastic Energy

Document Summary

To describe the state of an object, or a system of objects, in terms of a new quantity. To characterize the motion of a system in terms of kinetic energy. To quantify the energy transfer into or out of a system in terms of the work done by an applied force. To characterize the position or configuration of a system with a potential energy, which can be associated with a conservative force. To model changes in the motion of a system using the law of conservation of energy, in which changed in motion can occur: *when energy is transferred into or out of a system, or. *when energy within the system is transformed from one type to another. * work: f is the applied force, is the displacement. 3)is the angle between and and . 2: the work w0 accelerates a car from 0 to 40 km/hr. 2 - (cid:2869)(cid:2870)mvi: w0 402 w1 (802 - 402) .

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Physics: Principles with Applications
7th Edition, 2013
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ISBN: 9780321625922

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Related Questions

Which of the following statement are true mechanical energy? Include all that apply.

1.The total amount of mechanical energy of an object is the sum of its potential energy and the kinetic energy.

2. Heat is a form of mechanical energy.

3. The mechanical energy of an object is always conserved.

4. When non-conservative forces do work, energy is transformed from kinetic to potential (or vice versa), but the total mechanical energy is conserved.

5. A bowling ball is mounted from a ceiling by way of a strong cable. It is a drawback and released, allowed to swing as a pendulum. As it swings from its highest position to its lowest position, the total mechanical energy is mostly conserved.

6. When a friction force does work on an object, the total mechanical energy of that object is changed.

7. The total mechanical energy of an object remains constant if the only forces doing work on the object are conservative forces.

8. If an object gains mechanical energy, then one can be certain that a non-conservative force is doing work.

1. Can work be done on a system if there is no motion?

A) Yes, if an outside force is provided B) Yes, since motion is only relative C) No, since a system which is not moving has no energy D) No, because of the way work is definedĀ 

2. The quantity 1/2 mv 2 is

Ā A) the power supplied to the object by the forceĀ  B) the work done on the object by the forceĀ  C) the kinetic energy of the object. D) the potential energy of the object.

3. If you push twice as hard against a stationary brick wall, the amount of work you doĀ 

A) doubles. B) is cut in halfĀ  C) remains constant but non-zeroĀ  D) remains constant at zeroĀ 

4. If the net work done on an object is positive, then the object's kinetic energyĀ 

A) increases. B) decreasesĀ  C) remains the same D) is zero

5 A force of 20 N moves an object in the direction of the force. The work done when the object moves from 2.0 to 4.0 m is o A) 20 J OB) 40 J oC) 60 J D) 80 J

A child of mass m starts from rest and slides without friction from a height h along a slide next to a pool (Fig. P8.13). She is launched from a height h/5 into the air over the pool. We wish to find the maximum height she reaches above the water in her projectile motion. (a) Is the childā€“Earth system isolated or non-isolated? Why? (b) Is there a nonconservative force acting within the system? (c) Define the configuration of the system when the child is at the water level as having zero gravitational potential energy. Express the total energy of the system when the child is at the top of the waterslide. (d) Express the total energy of the system when the child is at the launching point. (e) Express the total energy of the system when the child is at the highest point in her projectile motion. (f) From parts (c) and (d), determine her initial speed vi at the launch point in terms of g and h. (g) From parts (d), (c), and (f), determine her maximum airborne height ymax in terms of h and the launch angle Īø. (h) Would your answers be the same if the waterslide were not frictionless? Explain.