Based on the provided worksheet, I have solved the problems related to the three classes of levers. Here is a summary of the solutions:
Class 1 Levers:
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Problem: A lever has a 50 N load and a 25 N effort force.
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Solution: The Mechanical Advantage (MA) is calculated using the formula MA = F_out / F_in.
* MA = 50 N / 25 N = 2.
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Conclusion: The lever multiplies the input force by a factor of 2.
Class 2 Levers:
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Problem 1: A lever has an input arm of 5 m and an output arm of 1 m.
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Solution: The Mechanical Advantage (MA) is calculated using the formula MA = D_in / D_out.
* MA = 5 m / 1 m = 5.
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Conclusion: The lever multiplies the input force by a factor of 5.
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Problem 2: To lift a box, you pull down 40 cm, and the box moves up 10 cm.
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Solution: The Mechanical Advantage (MA) is calculated using the formula MA = D_in / D_out.
* MA = 40 cm / 10 cm = 4.
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Conclusion: The lever multiplies the input force by a factor of 4.
Class 3 Levers:
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Problem: A lever has an input arm of 1 m and an output arm of 2 m.
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Solution: The Mechanical Advantage (MA) is calculated using the formula MA = D_in / D_out.
* MA = 1 m / 2 m = 0.5.
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Conclusion: The lever has a mechanical advantage of less than 1, meaning it multiplies distance rather than force. It requires more input force to move the load but moves the load over a greater distance.
In summary, the worksheet demonstrates how to calculate the mechanical advantage for different classes of levers using either force ratios (F_out / F_in) or distance ratios (D_in / D_out), depending on the information given. Class 1 and Class 2 levers typically multiply force (MA > 1), while Class 3 levers multiply distance (MA < 1).
Parent Tip: Review the logic above to help your child master the concept of lever worksheet.
