Recent content by rphung

My resulting vector was pointing towards the first quadrant. Is that right?

Homework Statement Homework Equations kq1q1/r^2 k being 8.98755 x 10^9 The Attempt at a Solution I found the 3 forces between the 3 charges using the above equation. I split up the forces into x and y compnents. Added the sum of the y's and the x's. Used Pythagorean theorem...

yeah that is the next question. Do you have any pointers on this one? How does the mass of the bar contribute to the torque?

Homework Statement Homework Equations f=ma T=rf The Attempt at a Solution i can't really visualize the model of the bar. But isn't the force needed to balance out the bar, just the sum of the weight of the bar, and the two masses on the left and right?

can you explain why the v's are the same? I thought the equation was vf^2=vi^2+2ad and when the car starts deaccelerating the vi is some unknown velocity while the vf will be 0

Homework Statement a cab driver picks up a customer and delivers her 2.00km away, on a straight route. The driver accelerates to the speed limit and, on reaching it, begins to decelerate at once. the magnitude of the deceleration is three times the magnitude of the acceleration. find the...