TEACHER-GUIDE-VERIFIED · TG-V9-038

3. A force is 72 units at distance r. Find the force at 2r and 3r.

Verified solution

Solution: At 2r: 72/2^2=18 units. At 3r: 72/3^2=8 units.

Source: Teacher Guide V9 · English V9. Match the numbers and wording in your printed question before using this solution.

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VIDEO HELP · TG-V9-038

Apply an Inverse-Square Model (TG-V9-038)

Assuming inverse-square force with other quantities fixed, a force of 72 units at r becomes 18 units at 2r and 8 units at 3r. Divide by the square of the distance factor and check both products. The short question requires this model assumption; units are generic, not newtons.

Space Math Explorers · approved worked example · 1:15 · Watch on YouTube

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These pages reproduce verified solution steps for the registered V9 questions. It does not diagnose learning needs or replace instruction from a qualified teacher or tutor.