Newton's First Law: zero net force means constant velocity
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mass = 4.0 kg

Newton's First Law · 2D Interactive Model

An object remains at rest or moves with constant velocity unless a non-zero net external force acts on it.

time0.0 sposition-13.80 mvelocity4.20 m/sacceleration0.00 m/s²ΣFx0.0 N
Current law reading
Net force is zero: acceleration is zero, so velocity stays unchanged.
Pure first-law state: Applied Force = 0 N and Friction = 0 N. Then ΣFx = 0, so a = 0 and velocity stays constant.
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