Well weight is a force. Net forces can vary.
Net forces but weight is not the net force! Weight won't change unless the mass changes.
Well weight is a force. Net forces can vary.
Net forces but weight is not the net force! Weight won't change unless the mass changes.
Weight is most definitely a net force.
F=ma.
It will still be 1000, you aren't spinnin the pistons in the opposite direction at 1000rpm.
No your spinning the engine block attched to the helicopter.
That (when the engine is firing) is 'attached' by explosive force to the pistons.
No free moving element
It will still be 1000, you aren't spinnin the pistons in the opposite direction at 1000rpm.
You scenario of cancelling forces would chowder work on an electric motor.
As part of what the motor works, is attached to the casing. The permanent magnets. So in this case the shaft would have a zero speed, relative to ground. But a relative speed to the motor casing of 1000
It's never the net force though as there will always be other forces acting on it.
The free moving elelement is the crankshaft.
Rolling an orange will make the white stuff come off with the skin.
But the cranshaft isn't free moving as when the engine is fired it has power transfered directly to it and through it into the rotors.
I have never seen that other definition in my life :O. I don't know how common it is, certainly not familiar with me.Wikpeda says we both win.
http://en.wikipedia.org/wiki/Weight
I personally think strictly limiting it to gravitational constants is a bit arbitrary and pointless.
Rolling an orange will make the white stuff come off with the skin.
In relation to the body.
I have never seen that other definition in my life :O. I don't know how common it is, certainly not familiar with me.