To solve this problem, we need to
read the mass from a triple beam balance by adding up the values indicated on each of its three beams.
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🔍 How a Triple Beam Balance Works:
A triple beam balance has
three sliding weights (riders) on three beams:
1.
Top beam (100-gram beam) – Each major mark = 100 g
2.
Middle beam (10-gram beam) – Each major mark = 10 g
3.
Bottom beam (1-gram beam) – Each major mark = 1 g, and it’s subdivided into 0.1 g increments (tenths)
✔ Total mass = Top beam reading + Middle beam reading + Bottom beam reading
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## 📏 Problem 1:
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Top beam (100g scale): Rider is at
200 g
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Middle beam (10g scale): Rider is at
70 g
-
Bottom beam (1g scale): Rider is at
4.5 g (between 4 and 5, halfway)
>
✔ Mass = 200 g + 70 g + 4.5 g = 274.5 g
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## 📏 Problem 2:
-
Top beam (100g scale): Rider is at
100 g
-
Middle beam (10g scale): Rider is at
30 g
-
Bottom beam (1g scale): Rider is at
3.8 g (just before 4 — looks like 3.8 based on position)
>
✔ Mass = 100 g + 30 g + 3.8 g = 133.8 g
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## 📏 Problem 3:
-
Top beam (100g scale): Rider is at
500 g
-
Middle beam (10g scale): Rider is at
60 g
-
Bottom beam (1g scale): Rider is at
7.6 g (between 7.5 and 8, slightly past 7.5)
>
✔ Mass = 500 g + 60 g + 7.6 g = 567.6 g
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##
✔ Final Answers:
1.
The mass is 274.5 g
2.
The mass is 133.8 g
3.
The mass is 567.6 g
*(All answers include S.I. unit: grams “g”)*
Let me know if you’d like a diagram explanation or video-style walkthrough!
Parent Tip: Review the logic above to help your child master the concept of triple beam balance worksheet.
