Select the expression that is equivalent to 4-3i
2 answers:
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Since the mass and weight vary directly, they are linked by an expression like
where w is the weight, m is the mass and k is the constant which gives the proportion.
Approach 1:
We may deduce the value of k from the first example: if 5kg weight 20N, then
And once k is known, solve the second example for m:
Approach 2:
Since the two quantity vary directly, they are in proportion. So, we can write a proportion like
mass1 : weight1 = mass2 : weight2
and solve it for mass2:
Of course, both approaches give the same result.