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question 18
what is the weight, in newtons, of a 3,500 g rock on earth?
35 n
3.5 n
0.35 n
3,500 n
35,000 n

Explanation:

Step1: Convert mass to kg

The mass of the rock is $m = 3500\ g=3.5\ kg$ (since $1\ kg = 1000\ g$).

Step2: Use weight formula

The weight formula is $W = mg$, where $g = 10\ m/s^{2}$ (approximate value of acceleration due to gravity on Earth). Substitute $m = 3.5\ kg$ and $g = 10\ m/s^{2}$ into the formula: $W=3.5\times10 = 35\ N$.

Answer:

35 N