Quote:
Erick Mead wrote:
It is how it is described -- but your instinct of a problem is right. f = ma ; a = dv/dt ; v = dx/dt
Without a change of position of some mass in a period of time there is no force. No physical movement means no acceleration means no force.
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A screwjack is used to lift up a car, so the screwjack exerts a force greater than the weight of the car. What is the mass associated with the force from the screwjack?
Regards,
Mike Sigman