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A pair of scissors, Nutcracker, Key ring...

A pair of scissors, Nutcracker, Key ring, Wheelbarrow

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To solve the question regarding the items: a pair of scissors, nutcracker, key ring, and wheelbarrow, we need to identify which class of lever each item belongs to. ### Step-by-Step Solution: 1. **Understanding Levers**: - A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum. Levers are classified into three types based on the position of the load, effort, and fulcrum. 2. **Identifying Each Item**: ...
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