A textbook weighs 58.8 N on Earth. What is the mass of the textbook?
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Given:
Weight of a textbook = 58 N
N = kg. m/s^2
Determine the mass.
Solution:
When we say weight of an object, this means that the force of gravity is included, hence when we say mass, the force of gravity is excluded. We know that acceleration due to gravity is equal to 9.8 m/s^2, and it is multiplied to the mass of an object in order to get its weight. Since we are given the weight of a textbook, in order to determine it's mass, we divide it by 9.8.
Mass = Weight / Acceleration due to gravity.
Mass = 58 N / 9.8 m/s^2
Mass = 5.92 kg
The mass of a textbook is 5.92 kg