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An object in motion will a
Stay in motion until another force acts upon it. For example when you through a ball gravity pulls it down to earth and it stops. The ball wuss at rest until you through it so your force made it move or it would still be at rest.
Force is measured in newtons. If someone pushes a bed with 125 newtons one direction and some pushes the same bed the opposite direction with 150 newtons then the bed will go 25 newtons in that direction.
A spring scale calculates the gravitational force on on object using a spring that hooks to the object.
Forces