Sci. 8- Mechanical Systems: Section 2.1

Roads in the mountains have sections to help vehicles up a steep incline, by making sharp

turns back and forth in opposite directions, after raising the car to a higher altitude. These roads are an example of a simple machine – the inclined plane, and are called ...

Your car has a flat tire, but you don’t have a jack to lift it up, so you can change the tire.

What machine could you make that would make it possible to lift the car ...

Mechanical advantage is the amount by which a machine can multiply a force. The force

that the machine applies to the object is called the ...

To calculate the mechanical advantage or force ratio, divide the output force by the input

force. A machine that is able to move an object that weighs 36 Newtons with 6 Newtons of force has a mechanical advantage of ...

A pulley system can provide a mechanical advantage. Look at the illustration below (with the GOLD pulleys) and identify what the mechanical advantage of this pulley system is.

This is the Example:

The mechanical advantage is 4.

If it takes 45 N of force to lift a 180 N carton using a pulley system, what would the pulley

system look like ...

Speed Ratio is calculated by dividing the ...

To calculate the Mechanical Advantage of a pulley system, you count... (https://roperescuetraining.com/physics_calcma_counting.php)

In most machines, you don’t get something for nothing. When you gain a mechanical advantage, you are gaining ...

A bicycle is a useful machine because it gets us from place to place much faster than we could walk. As a machine it has a mechanical advantage of less than one, but what about speed ratio? The speed ratio of a bicycle is ...

What can account for the fact that mechanical advantage and speed ratio are different in real situations?

Efficiency is a measure of how well a machine does work. Dividing the mechanical advantage by the speed ratio and multiplying the result by 100 will determine the efficiency of the machine. A pulley system that has a speed ratio of 3 and a mechanical advantage of 2 has an efficiency of ...