Which of the following are correct combinations of simple machines and their uses?

1. Screw – To hold things together

2. Lever – To increase speed

3. Wedge – To split or cut objects

4. Pulley – To reduce the distance to lift objects

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• A 1,3 and 4
• B 1,2 and 3
• C 2 and 4
• D 1 and 3

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Answer: D. 1 and 3

A screw fastens materials together, while a wedge uses a sharp edge to split or cut objects.

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