A stone resting on the ground has a gravitational force of 2 N acting on it.
What is the weight of the stone? What is its mass?
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Solution:
Weight = Mass * Acceleration due to gravity
W = m * a
2 = m * 9.8
m = 2/9.8
m = 0.204 kg
Weight of the stone is 2 N and mass of stone is 0.204 kg
Explanation:
W = F = mg
W = mg is used applied all the time whether the object is in acceleration or not
F = mg is used when the object is falling freely due to acceleration due to gravity and not any other external force.
Weight is defined simply as the object which is experiencing force due to gravity and it can be calculated as the mass * acceleration due to gravity because weight is like force and their SI unit is Newton(N).
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