Originally Posted By: Orac
Now lets see if you can extend that with a bit more intelligence than Paul. Assuming you and the accelerometer are in the same reference frame, can you be accelerating if the accelerometer measures zero?

Yes, if you are in freefall. You and all the components of the accelerometer will be subject to the same force. If there are no counteracting forces, such as standing on the floor of an elevator, the accelerometer will not be able to detect the acceleration. Basically the accelerometer can only measure the difference between the net force on the body of the accelerometer and the net force on the sprung mass.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.