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I am going to hazard a guess that crowbars are so basic, so simple and useful in so many ways, that their use [levers] in one form or another goes back to the earliest periods of the human species. It would be very much the same for the wheel. Their first use is lost in the far distant ages past.

The origin of the word crowbar is suspected to be from the 1400's when it was called a crow bar. It is believed that the tool was called this because the bar looks like a crow's beak or crow's foot at one end and is used the same way a crow pries open a nut.

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How much force does it take to break a crowbar?

The amount of force required to break a crowbar can vary depending on factors such as the material of the crowbar and how it is being used. Typically, a crowbar is designed to withstand significant force and is difficult to break with just human strength. It may require a hydraulic or mechanical device to break a crowbar.


Where is the load effort and fulcrum on a crow bar?

The load is the object being lifted by the crowbar, the fulcrum is the point on which the crowbar pivots to lift the load, and the effort is the force applied to the crowbar to lift the load.


Is a crowbar considered a pully?

No, a crowbar is not considered a pulley. A crowbar is a metal tool used for prying or levering objects, while a pulley is a simple machine that consists of a wheel on an axle and a rope or belt that can change the direction or magnitude of a force.


How much does the average crowbar weigh?

The average crowbar weighs between fifteen and thirty pounds, depending on the size of a bar. Bar sizes will vary so the best way to find out how much a certain crowbar weighs is to use a scale.


If you have to apply 40 N of force on a crowbar to lift a rock that weighs 400 N what is the actual mechanical advantage of the crowbar?

The mechanical advantage of the crowbar is 10. This is calculated by dividing the load force (400 N) by the effort force (40 N). In this case, the mechanical advantage shows that the crowbar amplifies your force by a factor of 10 to lift the rock.