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One newton is defined as the force needed to accelerate a system of what mass?
AOne newton
BOne kilogram
COne gram
DOne tonne
Answer & Solution
Correct answer: B. One kilogram
1. The unit is defined from a standard mass and acceleration.
2. The SI unit of force is called the newton.
3. It is the force needed to accelerate a 1-kg system.
4. That acceleration is one metre per second squared.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 4 'Dynamics: Force and Newton's Laws of Motion', sections 4.1-4.8_
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