Recent content by baird.lindsay

wrong way its 20 thank you!

Moment about G = -(30*800) + (-300*50) + 60 A + 17.32*500 + (-17.32*500(4/5)) + (-40*500(3/5)) =0 When I do that I get 821lb? I am still off...

Homework Statement I need to find the moment about G. Please ignore the question in the image. http://img13.imageshack.us/img13/6086/4cv0.jpg Uploaded with ImageShack.us Homework Equations r X F The Attempt at a Solution Moment about G = -(30*800) + (-300*50) + 60 A + 17.32*500 +...

Why does it have to have a negative x component? Unit Vector BA =< -450, 300, 180> Unit Vector AB=< 450, -300, -180> My solution manual is using BA but my teacher is saying it doesn't matter so I am confused. Please explain.. Thanks in advance:)

Homework Statement knowing the tension in cable AB is 570 N, determine the moment about each of the coordinate axes of the force exerted on the plate at B . This link has a picture...

how would I go about that?

This equation only works if you have a constant acceleration, but do you have that in this case? What about after you reach terminal velocity? Are you given a time that it takes to reach the terminal velocity? no it doesnt:( but yes after if your terminal velocity...there's no time in...

Homework Statement I have two skydivers umping out of a plane at 5000m . Skydiver A is using extended arms and reaching a terminal velocity of 41.53m/s. Skydiver B jumping 20 second later headdown and reaching a terminal velocity at 90 m/s. The question is to find the time the second diver...

I am confused because when I draw a free body diagram. I draw it through the center of the collar and move the weight vector to the negative y axis. I have the tension force in the first quadrant , I have the P force on the -x axis , and I have the weight force on the negative y axis. That...

Homework Statement This is a question from statics course. Collar A is connected to a 50lb load on a frictionless horizontal rod. Determine magnitude of P to maintain equilibrium when x=4.5. Im confused on the concept of Tension I originally got the answer 11.25 lb like the images...

Q is the total charge enclosed by the surface. its located in the center of the surface...Im not sure I understand.

Q is the total charge...

Homework Statement When is the net flux for a cube 0 and when is it not? Homework Equations ∫EdA= Q/8.85E-12 The Attempt at a Solution if you have no test charge then the flux of a cube is zero. but if you have a test charge then the net flux is the charge divided by 8.85E-12...

no they are different...i get it now ..thanks for all the help..this was driving me crazy!

therefore 1256.4 N/C is this correct?