Net Definition and 1000 Threads

I have been working on the following two problems and I can't seem to get any progress. Any help from anyone would be greatly appreciated. I know it seems simple to those who are familiar but I have no background in this type of equations. 1. A helicopter travels northwest 70.7 miles, then...

Homework Statement You drag a(n) 15.8 kg steamer trunk over a rough surface by a constant force of 90.9 Nacting at an angle of 28.6? above the horizontal. You move the trunk over a distance of22.8 m in a straight line, and the coefficient ofkinetic friction is 0.18. The acceleration of...

Homework Statement A cylindrical shell of radius 8.1 cm and length 247 cm has its charge density uniformly distributed on its surface. The electric field intensity at a point 20.3 cm radially outward from its axis (measured from the midpoint of the shell ) is 41800 N/C. Given: ke =8.99×10^9...

Homework Statement The 'net force' in the statements below is the sum of ALL forces acting on the body. True or False 1. During the collision of a car with a locomotive, the locomotive exerts an equal size force on the car as the car exerts on the locomotive. 2. If two objects have...

Homework Statement a rubber ball mass of 0.08 kg bounces vertically on a concrete floor. the ball strikes the floor at 10 ms-1 and rebounds at 8 ms-1. The time in contact with the floor is 0.05 sec. Calculate the average net force acting on the ball during the contact with the floor...

Homework Statement Three tiny charged metal balls are arranged on a straight line. The middle ball is positively charged and the two outside balls are negatively charged. The two outside balls are separated by 20 cm and the middle ball is exactly halfway in between. The absolute value of the...

i keep getting this question wrong can some1 help -------------------------------------------------------------------------------- two point charges located on the x axis: one charge, q1 = -16.0 , is located at x1= -1.650m ; the second charge, q2= 38.5nC , is at the origin x=0. A 3rd...

Homework Statement q1 = 4 mC at the origin q2 = 2 mC at x=1.0m y=0.0m q3 = 1 mC at x=1.0m y= 1.0m q4 = 3 mC at x=0.0m y= 1.0m What is the net force on q2? Give magnitude and direction of the force. Homework Equations E = kq/r^2 E = F/qThe Attempt at a Solution Ok after plotting the locations...

Homework Statement A charge of -5.66 x 10-6 coulombs exists on each of the three spheres in the figure below. Sphere B is 0.364 meters from sphere A, and sphere C is 0.276 meters from sphere A. b. Find the magnitude and direction of the net electric field at the location of sphere A...

Homework Statement Find the electric field at the center of a square having side = 1m and having the following charges at each corner: Q1:-1 x 10^-6 Q3: -2 x 10^-6 Q2: 2 x 10^-6 Q4: -1 x 10^-6 (Q1 is upper left corner, Q2 is upper right, q3 is lower left and Q4 is lower right) Homework...

Homework Statement A 3.3 μC point charge is on the x-axis at x = 4.9 m, and a 3.9 μC point charge is on the x-axis at x = 2.6 m. The Coulomb constant is 8.98755 × 109 Nm2/C2. Determine the magnitude of the net electric field at the point on the y-axis where y = 2.5 m. Answer in units...

Homework Statement The longest shish kebab ever made was 881.0 m long. Suppose the meat and vegetables need to be delivered in a cart from one end of this shish kebab’s skewer to the other end. A cook pulls the cart by applying a force of 40.00 N at an angle of 45.00° above the horizontal...

Homework Statement During a tennis match, a player serves the ball at 23.4 m/s, with the center of the ball leaving the racquet horizontally 2.31 m above the court surface. The net is 12.0 m away and 0.900 m high. When the ball reaches the net, (a) what is the distance between the center of...

Homework Statement Two point charges lie on the x axis. A charge of -2.5 µC is at the origin, and a charge of +8.5 µC is at x = 10.0 cm. What is the net electrical field at points x = +4 and at x = -4? Homework Equations E = kq/r^2 The Attempt at a Solution For x = +4... E=...

Homework Statement four particles are fixed in place and have charges q1 = q2 = 3e, q3 = 7e, and q4 = -28e. Distance d = 6.7 µm. What is the magnitude of the net electric field at point P due to the particles? Homework Equations Im not sure what form of the magnitude equation to use for...

Homework Statement A 2.60 kilogram mass is moving in a plane, with its x and y coordinates given by x = 5.40t2 - 1.30 and y = 2.75t3 + 1.80, where x and y are in meters and t is in seconds. Calculate the magnitude of the net force acting on this mass at t = 2.10 seconds.Homework Equations Our...

We have been given three balanced equations to write as net ionic equations. Our teacher forgot to teach us this bit and has now left the college. I'm really stuck, any help would be so kindly appreciated TY x The equations are: 1. Pb(NO3)2 (aq) + 2KCl (aq) = PbCl2(s) + KNO3 (aq)...

What average net force is required to stop... 1. a 1500 kg vehicle is traveling at 75km/h. what is the average net force required to stop the vehicle within a 4.0 second interval? 2. f=ma? but i don't know acceleration? 3. force = 1500x (75/4) ?

Homework Statement A car is driven east for a distance of 43 km, then north for 29 km, and then in a direction 29° east of north for 24 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total...

Homework Statement A 60.0-kg person, standing on a diving board, dives straight down into the water. Just before striking the water, her speed is 6.50 m/s. At a time of 1.75 s after entering the water, her speed is reduced to 1.10 m/s. What is the average net force (magnitude and direction)...

Homework Statement A proton and an electron form two corners of an equilateral triangle of side length 5.3 x 10-6 m. What is the magnitude of the net electric field these particles produce at the third corner? Homework Equations E=kQ/r^2 The Attempt at a Solution I drew a triangle...

Homework Statement Two particles are fixed to an x axis: particle 1 of charge -1.23 x 10-7 C is at the origin and particle 2 of charge +1.23 x 10-7 C is at x = 15.5 cm. Midway between the particles, what is the magnitude of the net electric field? Homework Equations E=kQ/r^2 and/ or...

Homework Statement A. Two particles having charges of 0.600 nC and 9.60 nC are separated by a distance of 1.60 m. At what point along the line connecting the two charges is the net electric field due to the two charges equal to zero? B. Where would the net electric field be zero if one of...

1. Homework Statement Two point charges q1 = -5.60 nC, and q2 = -14.0 nC are separated by 25.0 cm (see figure below). http://www.webassign.net/yf12/21-p-031-alt.gif (a) Find the net electric field these charges produce at point A magnitude 10360 N/C direction is to the right (b)...

Homework Statement Two point charges q1 = -5.60 nC, and q2 = -14.0 nC are separated by 25.0 cm (see figure below). http://www.webassign.net/yf12/21-p-031-alt.gif (a) Find the net electric field these charges produce at point A magnitude 10360 N/C direction is to the right (b)...

Homework Statement Find positions of four charges in a plane (+1C, -1C, +2C, -2C) that result in an equilibrium (zero net force on each charge). Report positions as four (x,y) pairs. Homework Equations F = \frac{k_{e}q_{1}q_{2}}{r^{2}} The Attempt at a Solution I had no idea...

Homework Statement The figure shows two charged particles on an x axis: -q = -8.00 × 10-19 C at x = -1.50 m and q = 8.00 × 10-19 C at x = 1.50 m. What are the (a)x- and (b)y- components of the net electric field produced at point P at y = 5.00 m? Homework Equations...

Homework Statement http://online.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?courses/phys211/oldexams/exam3/sp08/fig10.gif What's the net torques about the pivot, represented by the dot (•), in the diagram D. The solid arrows represent the magnitude and direction of the forces...

Sorry, not so much of a problem, more. . I need to understand. Homework Statement Finding the net head. This website (http://www.oregon.gov/ENERGY/RENEW/Hydro/Hydro_index.shtml ), says that the gross or "static" head is the vertical distance between the top of penstock and the point...

Homework Statement When calculating the net electric flux, we use the equation EA=electric flux. If there are multiple charges in different closed surfaces, do we use the net electric field multiplied by the area for each closed surface to solve the electric flux for a single closed object...

Homework Statement http://img39.imageshack.us/img39/8019/92452636.jpg Homework Equations The Attempt at a Solution i got -234 for the last part but it should be abs.value so 234.. but it didnt work. is my work correct?

Homework Statement http://img8.imageshack.us/img8/8541/netforce.jpg Homework Equations The Attempt at a Solution The forces on the left and right sides cancel. The forces on the top and bottom segments of the loop are in opposite directions, so the magnitudes subtract. So i...

Two charges are separated by 1.0 m. Q1 has a negative charge of 4.2 µC and Q2 has a positive charge of 1.4 µC. At what position is the net electric field that is produced by both Q1 and Q2 equal to zero? Extra Credit: If a +5.0 µC charge is placed at this position, what force would act on it...

Two charges are separated by 1.0 m. Q1 has a negative charge of 4.2 µC and Q2 has a positive charge of 1.4 µC. At what position is the net electric field that is produced by both Q1 and Q2 equal to zero? Extra Credit: If a +5.0 µC charge is placed at this position, what force would act on it...

ive been given a problem in my school work. it involves 2 veins that have been cut by a fault and displaced along the fault plane. the question gives the orientation of the cut veins on either side of the wall and the orientation of the fault. it asks for the following: net slip, plunge and...

Homework Statement I'm supposed to find the net force that the southern hemisphere of a uniformly charged sphere exerts on the northern hemisphere. I must express my answer in terms of the radius R and the total charge Q. Homework Equations F = QE \int E da = \frac{1}{\epsilon_{0}}Q The...

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 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...