What is Net: Definition and 1000 Discussions

Homework Statement Four forces act on bolt A as shown. Determine the net force (in Newtons) and direction (in degrees upward from the x-axis) acting on the bolt. Homework Equations Law of Sines: a/sinA = b/sinB = c/sinC Law of Cosines: a^2= b^2 + c^2 - 2bccosAThe Attempt at a Solution I...

[b]1. You drag a(n) 16.9 kg steamer trunk over a rough surface by a constant force of 177 N acting at an angle of 34◦ above the horizontal. You move the trunk over a distance of 59.3 m in a straight line, and the coefficient of kinetic friction is 0.186. The acceleration of gravity is 9.8...

Hi, Why there are no materials where the net angular momentum is not zero? Permanent magnets have a net magnetic moment coming from the sum of electron spins + orbital magnetic moments. Why the net angular moment cancels out? Or in other words: Is there any material that is not rotating...

is there no stress when a net force is not equal to 0 ,i mean that whenever we talk about stress why is the net force 0 ?

A tiger is pursuing a rat at 3.3 m/s the Tiger is 70kg what net force is required during this time?

Homework Statement If wind blows at 24 m/s over your house, what is the net force on the roof if its area is 300 m squared? Homework Equations Bernoulli's equation? P1+1/2pv1sqrd+pgy1=P2+1/2pv2sqrd+pgy2 The Attempt at a Solution Really didn't know where to go with this. I...

Confused :( Homework Statement A 200 kg object and a 500 kg object are separated by 0.500 m. Find the net gravitational force exerted by these objects on a 50.0 kg object placed midway between them.

Homework Statement A 51kg child goes down a 42 degree slide. What is the normal force on him? If the coefficient of friction is .10, what is the net force on him? How far down does he slide before reaching 2.5 m/s?Homework Equations Fk = μFn F = ma The Attempt at a Solution Fn = 51gcos(42)...

Homework Statement A certain wheel has a rotational inertia of 12 kg m2. As it turns through 5.0 rev its angular velocity increases from 5.0 rad/s to 6.0 rad/s. If the net torque is constant, its value is: Homework Equations Angular acceleration = dW/dT Net torque = (angular...

The position of a .64 kg mass undergoing simple harmonic motion is given by x(t) = (.16 m)cos(\pit/16). What is the maximum net force on the mass as it oscillates? (hints: First, match the quantities in the equation above to x(t) = Acos(\omegat). Next, recall that the max. net force equals the...

Homework Statement the questions says, "Person A who's mass is 40kg, is being pulled across the ground by a horse at a speed of 4 m/s [E]. All of a sudden the horse accelerates for a period of 5 seconds. During this time person A experiences a displacement of 40 m [E]. What net force was...

Here's the question. "Four identical masses of 800 kg each are placed at the corners of a square whose side length is 10.0 cm. What is the net gravitational force on one of the masses due to the other three?" for convenience, I replaced mass with "M" and the distance with "d" So, I...

Homework Statement Does net force on a system depend on forces that are internal to that system. Homework Equations My problem with understanding this is I don't know any equations that relate net force, external force and/or internal force. The Attempt at a Solution My guess is...

Homework Statement When a carpenter shuts off his circular saw, the 10.0-inch diameter blade slows from 4440 rpm to zero in 2.5 s. A.What is the angular acceleration of the blade? In rev/sec2 B.What is the distance traveled by a point on the rim of the blade during the deceleration? In feet...

Tides are created by the gravitational attraction of the sun and moon on Earth. Calculate the net force pulling on Earth during a)New Moon b)Full Moon c)First Quarter Moon. Mass of the Moon: 7.35 x 10^22 kg Mass of the Earth: 5.98 x 10^24 kg Mass of the Sun: 1.99 x 10^30 kg Distance from the...

So I have the mass, volume, and the density of the gas inside it...how do i work out the net force? Is it to do with working out weight and then viscous drag?

1. Homework Statement Three charges lie along the x -axis. The positive charge q1 = 10.0 microC is at x = 1.00 m, and the negative charge q2 = -2.00 microC is at the origin. Where must a positive charge q3 be placed on the x-axis so that the resultant force on it is zero? Answer: x = - 0.809 m...

Homework Statement Hickey reached a speed of 35 m/s on his skateboard . Suppose it took 21,000 Joules of net work for Hickey to reach this speed from a speed of 25 m/s. Find Hickey's mass Homework Equations Work = Force x Distance Cos(theta) The Attempt at a Solution From my...

Your 2000 kg Mercedes is accelerated from 10 m/s to 30 m/s in 4.75s. What is the average net force that you have applied to the car in that time interval?Givens are: mass= 2000 kg time= 4.75s acceleration=(Vf-Vi)/t= (30m/s-10m/s)/4.75s= 4.21m/s2 F=m*a= 2000kg*4.21m/s2= 8420 N Unidentified...

The masses and coordinates of three particles are as follows: 20.0 kg, (0.50, 1.00) m; 309.0 kg, (-1.00, -1.00) m; 18.0 kg, (0.00, -0.50) m. What is the gravitational force on a 20.0 kg sphere located at the origin due to the other spheres, magnitude and direction? Give the direction as an angle...

Homework Statement a weight lifter lifts a set of weights a vertical distance of 3.64 m. if a constant net force of 394 N is exerted on the weights, how much net work is done on the weights ? Homework Equations i need net work formula The Attempt at a Solution

a weight is lifted 3.64m if a constant net force of 394N is exerted on the weights, how much net work is done on the weights? in J that is..

How do you find the net force in vector addition, for example if I have F1 = 64 N @ 30 degrees and F2 = 45 N @ 45 degrees and F3 = 78 N @ 330 degrees how would I go about finding the net force?

A dog pulls on a pillow with a force of 7.9 N at an angle if 28.3 degrees above the horizontal \vec{F}_{net} = \Sigma \vec{F} = m \vec{a} A) What is the x component of this force? answer in units of N. B) What is the y component of this force? answer in units of N. help pls i...

Homework Statement A cylindrical shell of radius 7.00 cm and length 240 cm has it's charge uniformly distributed on it's curved surface. The magnitude of the electric field at a point 19.0cm radially outward from its axis (measured from the midpoint of the shell) is 36.0 kN/C. Find (a) the net...

Homework Statement A hamburger with a mass of 2500 kg was slided down a ramp that has a 45 degree incline, and the coefficient of kinetic friction betwen the hamburger and the ramp is .597. What is the net force acting on the hamburger? What is the net acceleration?Homework Equations Mass of...

Homework Statement A light rope passes over a light frictionless pulley. One end is fastened to a bunch of bananas of mass m, and a monkey of mass m clings to the other end of the rope. The monkey climbs the rope in an attempt to reach the bananas. (a) Treating the system as consisting of the...

Homework Statement [/B] A 2.0 kg otter starts from rest at the top of a muddy incline 85 cm long and slides down to the bottom in 0.50 s. What net force acts on the otter along the incline? mass = 2.0 kg distance = 85 cm time = .50 s net force = ?Homework Equations Fnet=ma I also used. V=x/t...

2 problems both with dealing with finding the magnitude of a net force. 1. A gust of wind blows an apple from a tree. As the apple falls, the gravitational force on the apple is 2.25 N downward, and the force of the wind on the apple is 1.05 N to the right. Find the magnitude and direction of...

Homework Statement It was just a basic work problem: The two ropes seen in the figure below are used to lower a 245 kg piano 6.0 m from a second-story window to the ground. How much work is done by each of the three forces? (T1 = 1910 N andT2 = 1140 N) There was a diagram with the...

Basically my instructor is confusing the heck out of me because I highly dislike how this course is structured. I dislike how in this specific chapter we are not taught: \SigmaW = \DeltaEnergy However, using this equation and my previous knowledge I can't seem to get the right answer in the...

Homework Statement Write the net ionic equation for H2SO4(aq) to the KMnO4(aq)Homework Equations The Attempt at a Solution I am confused on which one should i write. The first method is to list all the species, then use the data book to find which one is the strong OA and SRA. Multiply one or...

Can this be explained in terms of inelastic collisions? This is what I think: The collision is perfectly inelastic because the person and the net move together with the same velocity. This means that the initial kinetic energy of the system (and therefore the kinetic energy of the person) is...

Can someone tell me the full formula and net ion equation for these? I can't seem to get them right even thought I think my answers are right. a.NaClO(aq) + HCl(aq) → ( I got NaClO(aq) + 2HCl(aq) -> Cl2(aq) + NaCl(s) + H2O(l) but it won't accept my answer, so no idea of net equation.) b...

1. Mass m_1 on the frictionless table of the figure is connected by a string through a hole in the table to a hanging mass m_2. With what speed must m_1 rotate in a circle of radius r if m_2 is to remain hanging at rest...

When on the ground, Ian's weight is measured to be 646 N. When Ian is on an elevator, his apparent weight is 711 N. What is the net force on the system (Ian and the elevator) if their combined mass is 1050 kg? I know that Fnet is the sum of all forces. I don't have any examples of this...

Homework Statement A 58 kg person is in a head-on collision. The car's speed at impact is 13 m/s. Estimate the net force on the person if he or she is wearing a seat belt and if the air bag deploys. For some reason, I can't seem to get the correct answer to this question... I have no idea...

Homework Statement A force of 2N east and a force of 3N 25degrees N of E act on an object. What is the net force on the object? The answer according to the text is 4.9N 75Degrees E of N Homework Equations The Attempt at a Solution First express direction in terms of x-axis...

Homework Statement file:///C:/Documents%20and%20Settings/sjthompson/Desktop/p8-3.gif Don't know if the image worked. I think if you copy and paste it into browser it might work. Calculate the net torque (mag and direction) on the beam in the figure below about the following axes. Beam has...

Homework Statement I am given two two dimensional velocities one final one initial and the time taken for the velocity of the object to change. I am also given the mass and asked to calculate net force. The calculations are very easy but when asked for the net force am I supposed to give...

An experimental rocket sled can be accelerated at a constant rate from rest to 1000 km/h in 1.8 s. What is the magnitude of the required net force if the sled has a mass of 700 kg? help please!

Homework Statement 285 kg rowboat being pushed by a forward force of 112 N from the paddles. If its is accelerating at 0.120 m/s(squared) how much water resistance is it experiencing? (assume gravity and buoyancy cancel each other) Given: a = 0.120 m/s (2) Forward force = 112 N Mass =...

Homework Statement Figure 7-30 shows an overhead view of three horizontal forces acting on a cargo canister that was initially stationary but that now moves across a frictionless floor. The force magnitudes are F1 = 2.70 N, F2 = 5.31 N, and F3 = 9.69 N, and the indicated angles are θ2 =...

Homework Statement 13 equal charges, q, are situated at the corners of a regular tridecagon. What is the net force on a test charge, Q, situated at the centre. Homework Equations F=k(qQ/r^2) r^ (r^=r vector/r) The Attempt at a Solution The net force will be zero due to the...

Homework Statement This is more of a general question than it is a homework problem, therefore I'll begin by apologizing if I have violated any forum rules. If you can look past this transgression and help me with this question, I would greatly appreciate it. I'd like to determine the...

Homework Statement The milky way galaxy ( which includes the Sun) rotates about its center with a period of 200 million years. The Sun is 2X10^20m from the center of the galaxy. What is the net gravitational force on the sun due to the other stars in the milky way galaxy? Homework Equations...

the pathway for a mineshaft is described as follows: The first shaft extends north and down at an angle of 3.5 degree for 225ft to a vertical shaft which 125ft long. A third shaft then extends north and down at an angle 6.8 degree for 175ft. What is the total depth below ground level at the end...

Homework Statement Three charges lie along the x -axis. The positive charge q1 = 10.0 microC is at x = 1.00 m, and the negative charge q2 = -2.00 microC is at the origin. Where must a positive charge q3 be placed on the x-axis so that the resultant force on it is zero? Answer: x = - 0.809 m...

Homework Statement A 325 N force acts on an object with a mass of 42.5 kg at an angle of 27° , pulling the object along a flat surface. The coefficient of friction is 0.21 and the object's displacement is 320m. Calculate the net work done on the object. Homework Equations W=Fdcos(θ) Fg=mg...

Homework Statement Hey I am having problems understanding how to get the net ionic and ionic formula. Any suggestions and/or tips on how to do them?