would these two objects be attracted to each other? repelled? or not feel any force from each other? note for advanced students: you can assume charge is measured in any convenient units, e.g. coulombs or units of e. also ignore any dipole or higher-order multipole forces. these objects will... ∘ attract each other. ∘ repel each other. ∘ exert no force on each other.

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# Brief Explanations:
1. First, calculate the net charge of the first object:
   - Charges: $ +1 $ (blue +), $ -2 $, $ -1 $, $ -2 $.
   - Sum: $ 1 + (-2) + (-1) + (-2) = 1 - 2 - 1 - 2 = -4 $.
2. Then, calculate the net charge of the second object:
   - Charges: $ +2 $, $ -2 $, $ +2 $, $ -1 $.
   - Sum: $ 2 + (-2) + 2 + (-1) = 2 - 2 + 2 - 1 = 1 $. Wait, no—wait, looking at the diagram again: first object has one +, two -2, one -1? Wait, no, the first object: blue + (let's say +1? Wait, maybe the charges are: first object: + (let's assume +q), two -2q, one -q. Wait, maybe better to count the total positive and negative. First object: blue + (let's say +1 unit), red: -2, -1, -2. Wait, maybe the charges are: first object: + (1), -2, -1, -2. So total positive: 1, total negative: 2 + 1 + 2 = 5. So net charge: 1 - 5 = -4. Second object: two +2, one -2, one -1. So positive: 2 + 2 = 4, negative: 2 + 1 = 3. Net charge: 4 - 3 = +1? Wait, no, maybe the + and - are in units, like + (1), -2 (two of them), -1 (one). Wait, maybe the first object: + (1), -2, -1, -2. So total charge: 1 - 2 -1 -2 = -4. Second object: +2, -2, +2, -1. So 2 -2 +2 -1 = 1. Wait, but maybe the charges are such that the first object's total charge: let's see the symbols. First object: 1 blue +, 2 red -2, 1 red -. So +1 + (-2) + (-2) + (-1) = -4. Second object: 2 blue +2, 1 red -2, 1 red -. So +2 +2 + (-2) + (-1) = +1. Wait, but that would be opposite charges? No, wait, maybe I misread. Wait, no—wait, the key is: like charges repel, opposite attract. But wait, maybe the first object's net charge: let's count the number of + and - with their values. Wait, the first object: + (let's say +x), two -2x, one -x. So total +x, total - (2x + x + 2x) = 5x? No, that can't be. Wait, maybe the charges are: first object: + (1), -2, -1, -2. So sum: 1 - 2 -1 -2 = -4. Second object: +2, -2, +2, -1. Sum: 2 -2 +2 -1 = 1. Wait, but -4 and +1: opposite signs? Wait, no, -4 is negative, +1 is positive. So opposite charges attract? Wait, but maybe I made a mistake. Wait, maybe the first object's charges: + (1), -2, -2, -1. So 1 - 2 -2 -1 = -4. Second object: +2, +2, -2, -1. So 2 +2 -2 -1 = +1. So net charges: -4 and +1. Opposite signs, so they should attract? Wait, but wait, maybe the charges are such that the first object's total charge is negative, the second is positive. So opposite charges attract. Wait, but let's re-express: first object: + (1) + (-2) + (-2) + (-1) = -4. Second object: +2 +2 + (-2) + (-1) = +1. So one is negative, one is positive. Opposite charges attract. Wait, but maybe I miscounted. Wait, the first object: blue + (1), two red -2, one red -. So 1 -2 -2 -1 = -4. Second object: two blue +2, one red -2, one red -. So 2 +2 -2 -1 = +1. So yes, opposite charges, so attract. Wait, but maybe the charges are in units where + and - are equal? Wait, no, the problem says "charge is measured in any convenient units". So net charge of first object: let's sum all charges. First object: + (let's say +q), -2q, -q, -2q. So total: q -2q -q -2q = -4q. Second object: +2q, -2q, +2q, -q. So total: 2q -2q +2q -q = q. So first object: -4q, second: +q. Opposite charges, so they attract. Wait, but maybe I messed up the charges. Wait, the first object: 1 +, 2 -2, 1 -. So +1, -2, -2, -1. Sum: 1 -2 -2 -1 = -4. Second object: 2 +2, 1 -2, 1 -. Sum: 4 -2 -1 = +1. So yes, opposite charges, so attract. Wait, but the options are attract, repel, or no force. So the correct answer is attract. Wait, but wait, maybe I made a mistake. Wait, maybe the first object's total charge: let's count the number of positive and negative. First object: 1 positive, 3 negative (two -2, one -1: total negative magnitude 2+2+1=5, positive 1: net negative. Second object: 2 positive (+2 each), 2 negative (-2 and -1: total negative 3, positive 4: net positive. So opposite charges, so attract. So the answer is attract.
# Answer:
attract each other.

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