# Introduction to Simple Machines - Simple Machines - Engineering Mechanics | Summary and Q&A

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April 9, 2022
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Ekeeda
Introduction to Simple Machines - Simple Machines - Engineering Mechanics

## TL;DR

Simple machines are machines that allow us to lift heavy loads with less effort, while compound machines are combinations of simple machines.

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### Q: What is a simple machine?

A simple machine is a machine that allows us to lift heavy loads by applying less effort. Examples include screw jacks, nail cutters, and hand pumps.

### Q: Can you explain how a screw jack is an example of a simple machine?

A screw jack is a machine where we apply less effort at the handle to lift heavy loads, such as a car. By rotating the handle, we can lift the car using comparatively less effort.

### Q: What is a compound machine?

A compound machine is a machine that consists of a combination of simple machines. Examples include cranes, bulldozers, and trucks, which utilize multiple simple machines in their operation.

### Q: What is the difference between load and effort in a simple machine?

Load refers to the resistance that needs to be overcome when lifting a certain load. Effort, on the other hand, is the quantity of force that we apply. In a simple machine, the load is always greater than the effort.

## Summary & Key Takeaways

• Simple machines are machines that help us lift heavy loads with less effort.

• Examples of simple machines include screw jacks, nail cutters, and hand pumps.

• Compound machines are combinations of simple machines and include cranes, bulldozers, and trucks.