physics
posted by bhatt .
4 people stand at the corners of a square. Fred stands at point (0,0)
Ted at (1,0) Ed at (1,1) and ned at (0,1). they each pull on a rope connected to the center of the square
(0.5,0.5). Fred exerts 11N, Ted exerts 11N, Ed 17N and Ned 15N. what is the net force exerted on the center point and what is the angle from the positive xaxis

Use symettry. If two are pulling from opposite corners, the net force in that direction is zero. If two are pulling from opposite corners with different forces, the net force is the difference.

If you draw this properly you will observe that along the FredEd line you have a resultant of 6N toward Ed. Along the TedNed line you have a resultant of 4N toward Ned.
If you combine the two new vectors graphically, you have a right triangle with the hypotenuse being the resultant. Use the Pythagorean Theorem to get the magnitude. To get the direction, D, use:
D = tan^1(4/6)+ 45^{o}
The above angle is measured from the Eastward direction upward (counterclockwise).
Respond to this Question
Similar Questions

Physics
idential point charges of 1.7e6 C are fixed diagonally on opposite corners of a square. A third charge is then fixed at the center of the square, such that it causes the potentials at the empty corners to change signs without changing … 
Physics
Two idencial point charges (q = 7.40 x 10^6 C) are fixed at diagonally opposite corners of a square with sides of length 0.440m. A test charge (q = 2.30 x 10^8 C), with a mass of 7.25 x 10^8 kg, is released from rest at one of … 
Math
Jon, Fred, Ted used the number they rolled on a cube to create a number. Jon created the number 214,312. Fred created the number 232,442. Ted's number was greater than Jon but less than Fred. What is Ted's number? 
Physics Electricity
Two identical point charges (q = 7.20 x 10^6 C) are fixed at diagonally opposite corners of a square with sides of length 0.480 m. A test charge (q0 = 2.40 x 10^8 C), with a mass of 6.60 108 kg, is released from rest at one … 
Physics
Two identical point charges (q = +4.60 x 106 C) are fixed at opposite corners of a square whose sides have a length of 0.510 m. A test charge (q0 = 4.80 x 108 C), with a mass of 9.80 x 108 kg, is released from rest at one of the … 
Maths
Fred is 10 yrs older than Ted. In 3 yrs time Fred will be 3 times as old as Ted. Let Fred be x yrs old now. Write an equation to represent this situation. Solve equation and state how old each person is now. 
Finite Math
Bill and Fred are betting on the outcome when two fair dice are rolled. If the dice sum is any even number, other than 8, Bill pays Fred $8. If the dice sum is 8, Bill pays Fred $1. If the dice sum is odd, Fred pays Bill $2. What is … 
physics
Fred and George who are identical twins (same body mass) are competing in aerial skiing. Fred hits the take off with a speed of 20 whereas George has a speed of 8.5. How much higher will Fred go? 
english
Both Greta and Fred were on the bus that arrived in Pittsburgh. Fred was glad to be home. He looked forward to visiting with old friends. Greta, on the other hand, dreaded seeing her old boyfriend. She already missed her days in New … 
Physics
Fred and George who are identical twins, same body mass, are competing in aerial skiing. Fred hits the take off with a speed of 15.8, whereas George has a speed of 8.3. How much higher will Fred go?