winterblanco
01.08.2019 •
Chemistry
Atextbook weighs 58.8 n on earth. what is the mass of the textbook?
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Ответ:
F = 58.8
a = 9.81
58.8 = 9.81m
m = 58.8/9.81 = 5.99 kg
Ответ:
Gravity force (friction towards Marek ).
Explanation:
According to the situation, Marek try to push the box which contains some mass because of sports equipment
Marek tries to push the box, but gravity tries to the down box on the floor.
So, box and floor create friction towards Marek
.