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What is the weight of a 1.0 kg object at the surface of the Earth?
A9.8 N
B1.0 N
C98 N
D0.10 N
Answer & Solution
Correct answer: A. 9.8 N
1. Weight is the gravitational force on a mass, equal to the mass times the acceleration due to gravity.
2. Identify the knowns: the mass is 1.0 kg and the acceleration due to gravity is 9.80 m/s^2.
3. Substitute the values: (1.0 kg)(9.80 m/s^2) = 9.8 N.
4. Quoting 1.0 N confuses the mass in kilograms with the weight in newtons.
_Source: OpenStax College Physics (CC BY 4.0), Ch 4 "Dynamics: Force and Newton's Laws of Motion", section 4.3 Newton's Second Law of Motion: Concept of a System_
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