Search: physics - forces

Number of results: 95,670

Phiscal science
gravitational, electromagnetic, and nuclear forces. 1. Why are these forces often called fundamental or basic forces? 2. Where are these forces found? 3. How are other forces related to them?
Thursday, October 2, 2008 at 7:39pm by Kent

6th grade science (physics)
explain Newton's 1st law in relation to forces, balanced forces and unbalanced forces
Sunday, April 18, 2010 at 12:24pm by Brandon

physics
The free-body diagram in the drawing shows the forces that act on a thin rod. The three forces are drawn to scale and lie in the plane of the screen. Are these forces sufficient to keep the rod in equilibrium, or are additional forces necessary I assume this is what I just ...
Monday, May 7, 2007 at 12:29pm by Panda

6th grade science (physics)
explain and describe Newton's 1st law and as it applies to forces, balanced forces and unbalanced forces
Sunday, April 18, 2010 at 12:28pm by Brandon

Physics
Typically sigma F is taken to mean the sum of all the forces acting on an object. It does not require sub- or super-scripts to denote specifically the forces it includes, unless you wish to specify some but not all of the forces. Then you could label the forces F1, F2, etc. ...
Wednesday, January 6, 2010 at 8:36pm by Marth

PHYSICS Gr.11
Objects which are at rest or moving at constant velocity, may have forces acting on them. However the forces are said to be balanced. QUESTION: Which special force is zero, when the forces are balanced? thank you :)
Thursday, April 8, 2010 at 5:58pm by NINI

physics
please check: Conductors can be charged by ___, while insulators cannot. a. grounding b. induction c. polarization d. contact D Which of the following is not true for both gravitational and electric forces? a. the inverse square distance law applies b. forces are proportional ...
Saturday, March 14, 2009 at 8:37pm by physics

chemistry
The force is repulsive when the molecules are brought close enough together that the outer charge clouds of the molecules touch, and this causes the molecules to repel each other. The repulsive forces are necessary so that the molecules do not destroy each other. The forces ...
Tuesday, January 6, 2009 at 11:03pm by Victoria

Chemistry(Please check)
1) For a series of small molecules of comparable molecular mass, which of the following choices lists the intermolecular forces in the correct increasing order? a) dipole-dipole forces < London forces < hydrogen bonds b) hydrogen bonds < dipole-dipole ...
Saturday, January 28, 2012 at 11:41pm by Hannah

physics
Two forces act on an object. The magnitude of the net force acting on the object a. equals the sum of the magnitude of the two forces b. equals the difference in the magnitudes of the two forces c. equals the average of the two forces d. cannot be determined from the given ...
Wednesday, February 6, 2013 at 11:29am by Carolyn

physics 20
Where are the forces being applied? The top of the tree? In what direction vertically are the forces?
Saturday, March 16, 2013 at 8:02pm by bobpursley

Physics
Forces appear as equal and opposite directed. In magnitude, the forces are the same. F=kqq/r^2
Tuesday, April 5, 2011 at 8:32pm by bobpursley

physics
centripetal force= mass*velocity^2/radius I cannot comment on any balanced forces, unless I know what the other forces are.
Monday, June 1, 2009 at 8:55pm by bobpursley

physics
Two forces are the only forces acting on a 2.8 kg object which moves with an accelera- tion of 2.5 m/s2 in the positive y direction. One of the forces acts in the positive x direc- tion and has a magnitude of 12 N. What is the magnitude of the other force f2? Answer in units
Wednesday, October 17, 2012 at 9:36pm by josi

Physics
Two forces are the only forces acting on a 7.8 kg object which moves with an accelera- tion of 4.5 m/s2 in the positive y direction. One of the forces acts in the positive x direc- tion and has a magnitude of 14 N. What is the magnitude of the other force f2? Answer in units of N
Sunday, October 14, 2012 at 5:55pm by Jessica

Physics
Which of the following statements is true about electric forces? A. Electric forces cause objects to only attract each other. B. Electric forces cause objects to only repel each other. C. Electric forces cause objects to repel or attract each other. D. Electric forces have no ...
Tuesday, April 7, 2009 at 5:20pm by sophie

Electrical versus Gravitational Forces (Physics)
It is a bad question, as what if the charges were 2 electrons each, and the masses involved were very enornous, such as in two dwarf stars. But ignoring that, electrical forces are in general much larger than gravitational forces. And, after all, Einstein raised the question ...
Friday, February 25, 2011 at 2:35pm by bobpursley

physics
I wish I understand what you think you dont know. the door has a center of gravity. You can label each hing with a horizontal force, and a vertical force. Then, write three equations Sum of horizontal forces=0 sum of vertical forces=0 sum of moments about any point is zero so ...
Sunday, April 10, 2011 at 12:59pm by bobpursley

physics
It means that two objects exert equal forces on each other, but in opposite directions. This is true no matter what kind of forces you are talking about.
Friday, February 10, 2012 at 2:49am by drwls

physics
Consider a pair of forces, one having a magnitude of 48 N, and the other 43 N. What maximum net force is possible for these two forces?
Thursday, September 30, 2010 at 12:55am by Hannah

Physics
Vectorially add the forces due to m2 and m3, acting upon m1. Use Newton's universal law of gravity for the individual forces.
Thursday, March 17, 2011 at 8:54pm by drwls

physics
Perform a vector addition of the forces due to the two other charges. Use Coulomb's law to compute the individual forces. Let us know where you need help.
Saturday, May 15, 2010 at 6:13am by drwls

physics
The forces acting on the arm of a person lifting a dumbbell. The force F is the force pulling on the hand due to the weight of the dumbbell, the force Warm is the weight of the arm and T is the tension due to the muscles connecting the arm and the trunk. Question: Due to ...
Tuesday, October 6, 2009 at 12:24pm by physics student

physics
If you are holding a dumbbell in your hand, there are three forces acting, Weight of the arm pulling the arm down, a tension force that the muscle in the shoulder exerts on the arm, and the force that the dumbbell exerts on the fist.. which of these forces are contact forces? ...
Saturday, September 19, 2009 at 5:21pm by sara

Physics - Another Question
"Three forces act at a single point. Two of the forces are 39N southwest and 45N north. What is the value of the third force that creates equilibrium?"
Wednesday, July 28, 2010 at 4:51pm by Stuck

Physics
All forces in this problem act on an object along the same axis. Two forces have values F = - 5 N and f = +10 N. What do we do to bring the objects in mechanical equilibrium?
Wednesday, October 14, 2009 at 8:40pm by Nala

Physics 1
The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the wire exerts two forces and ' on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 15.0 N, what is the ...
Monday, October 29, 2012 at 12:41pm by Donald

Physics
Two forces, 364 N at 19° and 253 N at 32° are applied to a car in an effort to accelerate it. The resultant forces of these two forces is 558.72 N. What is the direction of the resultant force (in relation to forward, with counterclockwise considered positive, with -...
Saturday, November 12, 2011 at 5:24pm by Steve

PHYSICS
The acceleration of the center-of-mass point of a system of particles depends on: a) all the forces acting on the system b) only the external forces acting on the system c) only the internal forces acting on the system
Monday, March 19, 2007 at 3:59pm by terrence

Chemistry
Discuss the types of intermolecular forces acting in the liquid state of each of the following substances. (Select all that apply.) 1. CH3CH2CH2CH2OH a) dipole-dipole forces b) London dispersion forces c) hydrogen bonding 2. CH3OH a) dipole-dipole forces b) London dispersion ...
Saturday, May 1, 2010 at 8:02pm by Jake

Science
There are only three types of forces in nature: nuclear forces. strong, weak electromagnetic forces. magnetism, electric charge gravity, with or without spacetime.
Monday, January 4, 2010 at 9:36pm by bobpursley

physics
Two forces of magnitude 80n and 60n are inclinde to each other at angle 90 calculate the resultant force and obtain it direction draw the system forces.
Saturday, September 29, 2012 at 12:04pm by jimye jackson

CHEMISTRY
although helium atoms do not combine to form He2 molecules is it fair to say that London dispersion forces (induced dipole forces)are what attract He atoms weakly to one another? The other choices are dipole-induced dipole forces Hydrogen bonding Ion-dipole forces dipole-...
Tuesday, May 11, 2010 at 8:00pm by Andy

physics
A wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces at 16 º angle on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 19.5 N, what is the magnitude ...
Friday, September 14, 2012 at 3:51pm by marissa

physics
I'm going to assume the diagram gives the tension in the string, because with what you stated you're missing a degree of freedom. Only two equations can be developed (Sum of forces = 0 in both the x and y direction). However, we're missing the tension's ...
Wednesday, February 29, 2012 at 8:24pm by David

PHYSICS Gr.11
If the sum of forces = 0 then balanced. If unbalanced then sum of forces = mass times acceleration
Saturday, April 10, 2010 at 12:50am by Damon

physics
Two concurrent forces have a maximum resultant of 45 newtons and a minimum of 5.0 newtons. What is the magnitude of each of these forces?
Wednesday, October 15, 2008 at 3:02pm by Stephanie

Physics
sum of forces vertical = 0 = mg - Ncos@ sum of forces horizontal = mv^2/r = Nsin@
Tuesday, March 20, 2012 at 10:29pm by David

PHYSICS HELP
I am having a real problem with this question. Through the process of doing work, energy can move between the external world and the system as the result of forces or work. I say it's forces, but someone else says it's work because only work and energy can be ...
Wednesday, January 10, 2007 at 11:06pm by Pat

Physics
L1 and L2 are not forces; they describe locations where forces are applied. Between what points are the lengths L measured? Where is the person's center of mass? I can visualize the problem but not the notation you are using. The sum of the forces on arms and legs equals ...
Friday, April 4, 2008 at 8:13pm by drwls

physics
The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the wire exerts two forces and ' on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 17.0 N, what is the ...
Tuesday, February 21, 2012 at 2:18pm by Natasha

AP Physics - Static Equilibrium
Assume the forces on each foot are equal, and the forces on each hand are equal. The total on all four appendages must equal 735 N. Set the total moment about a line through the feet/floor contact points equal to zero. This will let you solve for the sum of the forces on the ...
Friday, November 27, 2009 at 11:07pm by drwls

Physics
1. draw the figure, with forces. 2. Sum the vertical forces, and set to zero. 3. Sum moments about either end. You will have the solution.
Tuesday, November 16, 2010 at 4:52pm by bobpursley

Physics
for d) do u have to include the normal forces and the magnetic forces of the magnets in the calculation as well? if so, is the normal force of the lower magnet pointing up or down?
Saturday, October 25, 2008 at 12:29am by Anonymous

Physics
add the forces vectors. a= F/m combine the N-S forces, leaving you a S force, add that to E.
Sunday, October 31, 2010 at 8:32pm by bobpursley

government
In my class I had to choose a major national issue and identify the forces in a political party that help drive the party to its position on the issue. I chose education and the Democratic party. The driving forces part is where I am stumped. I figured the forces would be ...
Monday, December 19, 2011 at 12:08pm by m

Physics
forces right on rod = 0 = Fwallhorizontal - Tsin 30 So Fwall horizontal = 513/2 = 257 N forces up on rod = Fupwall +513 cos 30 forces down on on rod = 690 so Fupwall = 690 - 444 = 246 N
Friday, March 19, 2010 at 8:33pm by Damon

physics
A small component of 1cm x 1 cm x 1 cm is subject to external forces coming from all directions. Design a holder for the component capable of measuring those forces through sensors that are embedded in the holder and capable of measuring forces in x, y, and z. Without loose ...
Wednesday, January 4, 2012 at 1:49pm by John

Physics
Let the force on each crutch be C Newtons. m=mass of person kg g=acceleration due to gravity m/s/s Resolve all forces acting on the person in the vertical direction, Forces from soles + forces from crutches = weight (1/2)*mg + 2*C*cos(26°) = mg C=(1/2)mg/(2*cos(26&...
Saturday, September 26, 2009 at 4:59pm by MathMate

Physics
All forces in this problem act on an object along the same axis. Two forces have values -5N +10N respectively. What should be done to bring the system into mechanical equilibrium???
Wednesday, October 14, 2009 at 8:49pm by Nala

physics
an object is in equilibrium under the action of three forces.Two of these forces,A an B,are illustrated in the accompanying diagram.The third force,F,is not illustrated. 3.1What is meant by the resultant of A and B?
Wednesday, February 6, 2013 at 12:17pm by sphelele

physics
Think about Newton's third law (about forces and reaction forces) and the definition of impulse. The time of contact is the same for both ball and bat.
Saturday, November 21, 2009 at 7:10pm by drwls

science/chemistry
Dr Bob Although helium atoms do not combine to form He2 molecules. is it true to say that He atoms are weakly attracted to one another from London dispersion forces (induced dipole forces) or is there another force at play? It cant be Hydrogen bonding(there is no hydrogen here...
Tuesday, May 11, 2010 at 12:11am by Andy

bobpursley
work is ok, for the net forces add the two forces, the 365 and the 374N forces. Watch significant digits.
Wednesday, October 15, 2008 at 9:29pm by bobpursley

CHemistry
Additional Note: Intermolecular forces in general are attractions between molecules in a molecular substance. These forces determine physical properties such as boiling point (the stronger the forces the higher the BP), melting point (also the stronger the higher), vapor ...
Monday, May 18, 2009 at 3:19pm by GK

Physics
Two forces, 1 and 2, act on the 5.00 kg block shown in the drawing. The magnitudes of the forces are F1 = 47.5 N and F2 = 34.5 N. What is the horizontal acceleration (magnitude and direction) of the block?
Wednesday, October 3, 2012 at 11:18pm by Anonymous

Physics
Two forces, 1 and 2, act on the 5.00 kg block shown in the drawing. The magnitudes of the forces are F1 = 58.0 N and F2 = 26.5 N. What is the horizontal acceleration (magnitude and direction) of the block?
Wednesday, June 27, 2012 at 4:39pm by Emily

Physics
A 5.0 kg object is at rest with to forces applied to it, and a frictional force holding it in place. The two applied forces are: 15.0 N [x 60degrees y] and 12.0 N [x 215degrees y]. what is the coefficient of statics friction
Monday, March 21, 2011 at 7:28pm by priyank

Physics
To answer this, I would need to see the figure to know what is connected to what. Problems like this are generally solved by requiring that the sum of vertical forces and the sum of horizontal forces are both zero.
Wednesday, September 15, 2010 at 6:09am by drwls

physics
The upward normal force exerted by the floor is 620 N on an elevator passenger who weighs 650N. What are the reaction forces to these two forces? Is the passenger accelerating? If so, what are the magnitude and direction of acceleration?
Saturday, August 22, 2009 at 7:30pm by colleen

Physics
C and D are forces acting on the skydiver-chute system. A and B are internal forces within the system. They cancel out when considering the system as a whole.
Monday, February 15, 2010 at 10:19am by drwls

Physics
1)Which of the following statements is true about electric forces? A)electric forces cause objects to only attract each other. B)electric forces cause objects to only repel each other C)electric forces cause objects to repel or attract each other D)electric forces have no ...
Wednesday, April 9, 2008 at 12:11pm by Jon

Physics
For each of the three masses, they want to to add the gravitational attraction forces due to the other two. For mass b, the attraction forces will be in opposite directions. Use Newton's Universal Law of Gravity, with the factor G
Sunday, February 21, 2010 at 5:50pm by drwls

physics
If the cart moves with a uniform velocity, it means that the forces are in equilibrium (absence of acceleration). The only vertical forces acting on the cart are its weight (mg) and the normal reaction on the wheel exerted by the floor. Therefore the normal reaction equals mg...
Monday, June 14, 2010 at 5:08pm by MathMate

physics
two forces f1 and f2 are acting at a point such that the angles between them are (1) 30 degree (2) 60 degree and (3) 45 degree show that resultant forces will be
Saturday, March 23, 2013 at 4:16pm by cat

Physics - Multiple choice
An object is moving in a circle at a constant speed. From this you can be certain that a) there are at least two forces acting on the object, which balance each other. b) there are at least two forces acting on the object, which do not balance each other c) there must be more ...
Thursday, May 26, 2011 at 8:45pm by Casey

PHYSICS*****
Two forces parallel to the x axis do 18.1 J of work on a small tray while moving it 21.8 m in the x direction across a gym floor. One of the forces has a value of +3.69 N in the x direction. What is the other force?
Wednesday, March 21, 2012 at 9:11pm by Steve

Physics
ok, you are not considering the forces to be vectors. Adding them as if they are in a straight line won't work. Sketch the locations, and then the forces have to be added as vectors. I would change each force to components in the x and y direction, then add the x's, to...
Sunday, January 2, 2011 at 4:58pm by bobpursley

physics
When the mover pushes the box, two equal forces result. Explain why the box moves even though the forces are equal and opposite
Tuesday, May 8, 2012 at 7:34pm by Ej

physics
A jet plane is traveling at a constant speed in a straight line in level speed. What does this tell you about the forces acting on it, what forces are acting on it .
Sunday, March 25, 2012 at 12:40pm by Melissa

physics
The forces on it must sum to zero. That does not mean there are no forces. For example if a rock is sitting on your desk, gravity is pushing down on it and the desk is pushing up.
Saturday, January 19, 2008 at 10:13pm by Damon

physics
The sled has two friction forces acting on it while the sack is slipping backward. Compute the two forces from the weights and friction coefficients given, and add them.
Tuesday, July 20, 2010 at 11:47pm by drwls

Physics
I think you solve it like this...do you have the answer to verify? I am no genius in physics... Forces in the x direction = friction = mass x acceleration. friction forces is found by multiplying the coefficient of friction (u) by the normal force. so. -u x mass x gravity = ...
Saturday, November 17, 2012 at 5:33pm by Brenda

Chemistry
I prefer to call these forces instantaneous dipole-induced dipole (which is not one of the choices) or induced dipole-induced dipole (also not a choice). Many texts don't agree on what to call all the forces. I have seen them called dispersion forces, London force, and van...
Monday, February 25, 2008 at 11:45am by DrBob222

physics
Three forces are applied to a box wrench. find the total torque about the bolt in newton-meters caused by these forces. Is the torque a positive torque or a negative torque?
Thursday, May 24, 2012 at 6:04pm by Jen

Physics
I'm assuming by mu you mean the coefficient of friction, u(subk) to find it just sum your forces in the x and y directions and solve for u(subk) use the formula sum of the forces = mass x acceleration
Sunday, October 10, 2010 at 8:58pm by Taylor

Physics
Two 125 N forces pull on a 50 kg mass. One of the forces pulls to the right and the other pulls 90 degrees from the first force. What is the net acceleration of the mass?
Wednesday, September 12, 2012 at 6:58pm by Matt

physics
Two forces acting on a body in opposite directions,have the resultant velocities of 10newton. if they act at right angles to each other, the resultant is 50 newton.find the two forces.
Wednesday, March 16, 2011 at 10:31am by Abhishek

physics
the forces on the table act on a ring but are said to be concurrent. if the cords were rigidly to the ring would the forces necessarily be concurrent?? will you please give me some explanation answers about this...thanks a lot..
Tuesday, July 20, 2010 at 6:38am by josh

AQA Mechanics (M1), Statics and forces,please help
Perform vertical and horizontal force balances (static equilibrium) and solve for the two unknown forces. Assume that both forces are normal to the smooth plane surfaces, and pass through the cylinder radii.
Monday, March 19, 2012 at 5:44am by drwls

chemistry
Dipole-dipole forces act between molecules with different charges whereas dispersion forces are induced from a distance. Induced forces are never as strong.
Tuesday, April 27, 2010 at 6:09pm by DrBob222

Physics
This may seem tricky but the key to realize is that electric forces and gravitational forces = 0. In this case Mg=Eq since the charge floats in the electric field. there the equation = E=mg/q and that'll be your answer. (You can solve the math).
Monday, October 4, 2010 at 10:12pm by MJ

physics
A condition for mechanical equilibrium is that the sum of the forces acting equal zero. Another condition is that the sum of the _____A) centrifugal forces also equal zero B) centers of gravity balance.C) torques equal zero.D) rotational inertias equal zero. E) centripetal ...
Thursday, March 1, 2012 at 11:46am by jim

Porter model
Identify the competitive forces in Porterâ€™s model. What affect might these forces have on a business? What can a business do to respond to these forces?
Thursday, November 4, 2010 at 3:41pm by Dee

Physics
Forces F1=7.50N and F2=5.30N are applied tangentially to a wheel with radius 0.330 m. What is the net torque on the wheel due to these two forces for an axis perpendicular to the wheel and passing through its center? It depends upon whether or not the forces F1 and F2 are both...
Tuesday, March 27, 2007 at 1:52pm by Karla

math/physics
Forces with magnitudes of 2000 newtons and 900 newtons act on the machine part at angles of 30 degrees and -45 degrees respectively, with the x-axis. Find the direction and magnitude of the resultant of these forces.
Tuesday, April 10, 2012 at 5:08pm by Cydni

Physics
A 2.50- object is moving along the axis at 1.60 . As it passes the origin, two forces and are applied, both in the direction (plus or minus); .The forces are applied for 3.00 , after which the object is at the point , . What is F2?
Sunday, February 13, 2011 at 2:00pm by jahil

physics
Generally, first the length of a bridge is determined, and the cross section of the bridge is designed such that it will resist the bending moments, shear forces, and axial forces(if any) exerted on the bridge supporting member. The longer the span (i.e. length between ...
Sunday, June 27, 2010 at 10:49pm by MathMate

Physics
If five forces act towards the same point on a body at angles of 60, 120, 180, 240 and 270 degrees and their respective magnitudes are 60N, 40N, 30N, 25N and 20N. Determine whether this system of forces is in equilibrium; find the resultant.
Wednesday, March 3, 2010 at 10:21am by Chinedu

Physics
Which of the following best describes kinematics? a) Kinematics is a part of mechanics that involves the description of motion. b) Kinematics is the branch of physics that deals with the motion of objects and the action of forces on the objects. c)Kinematics is the study of ...
Friday, September 14, 2012 at 5:31pm by Kevin

12th grade Physics
The two charges at the 45 degree corners are each 1.0 m from the charge at the right angle. There are two perpendicular forces acting on the right angle vertex charge. Each has magnitude k Q^2/(1.0m^2) where Q = 1.0C and k is the Coulomb constant. (look it up) Add thse two ...
Tuesday, December 15, 2009 at 8:41pm by drwls

Physics
Difference between parallel coplanar forces and non parallel coplanar forces
Sunday, March 17, 2013 at 3:31pm by Ayo

Physical Science
What are the 4 nuclear forces? Out of the 4 which one is the strongest and which one is the weakest? Thanks http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html THANK YOU As a side note, these are not nuclear forces. They are the four fundamental forces in nature, ...
Wednesday, April 11, 2007 at 4:04pm by Zach

Physics
Within a book on a desk there are billions of forces pushing and pulling on all the molecules. Why is it that these forces never by chance add up to a net force in one direction, causing the book to accelerate "spontaneously" across the desk?
Thursday, August 26, 2010 at 6:25pm by Jenna

Chemistry!!! Help!
Which of the following types of intermolecular forces tend to be the weakest? Induced dipole-induced dipole forces Dipole-dipole forces Covalent bonding Dipole-induced dipole forces Hydrogen bonding
Monday, May 2, 2011 at 2:16pm by Anonymous

Physics-Please check
Do charged particles always experience equal but opposite electrical forces? My answer is The electric forces are directly porportional to the quantity of the charge on the objects. Is that correct-we just started learning this and I'm trying to answer this question and ...
Tuesday, March 8, 2011 at 6:36pm by Rachel B.

physics
A uniform disk with a mass of 27.3 kg and a radius of 0.309 m is free to rotate about a frictionless axle. Forces of 90.0 N and 125 N are applied to the disk, as the drawing indicates. (a) What is the net torque produced by the two forces? (b) What is the angular acceleration ...
Wednesday, November 2, 2011 at 12:16am by Sami

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

For Further Reading