Are scientific theories and laws developed in the acquisition of scientific knowledge
1 answer:
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Answer:
B)
Explanation:
The value the scale shows is the reaction force to the normal force (they are equal by Newton's 3rd Law) that the scale exerts on Eric.
The forces on Eric are his weight (downward) and this normal force (upward), so we can write the net force over him as (also using Newton's 2nd Law):
which means
and for our values this is:
as it is given that
now we will have
now the magnitude of this vector is given as
now to find the direction we can use