physics

Loy (spade)

Loy (spade) is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Loy (spade) rather than just read about it. In short: A loy is an early Irish spade with a long heavy handle made of ash, a narrow steel plate on the face and a single footrest. The word loy comes from the Irish word láí (Old Irish láige, Proto-Celtic *laginā), which means "spade".

Key takeaways

Loy (spade) belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Loy (spade) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Loy (spade) from memory before moving on to harder problems.

Reference excerpt

A loy is an early Irish spade with a long heavy handle made of ash, a narrow steel plate on the face and a single footrest. The word loy comes from the Irish word láí (Old Irish láige, Proto-Celtic *laginā), which means "spade". It was used for manual ploughing prior to and during the Great Famine.

Construction The loy is a narrow spade with a blade about 35 cm (14 inches) long by 7.5 cm (3 inches) wide and bent with a handle 1.5 to 1.8 m (5 to 6 feet) long. The handle is normally made of ash. The blade has a single step for use with the right or left foot.

Ridging using the loy The loy was traditionally used for cultivating the potato. In the 19th century, these were grown in a potato ridge, sometimes known as a lazy bed. Sods were turned from either side to form the ridge. This was sometimes called "copin the sods", and the sods forming the sides of the ridge were called cope sods. A sod of earth about 2 feet (60 cm) wide on each side of the intended ridge was lifted by the loy and turned over so that the grassy sides were together. Manure was spread on the ridge part first. Narrow ridges were most often made with sets of around twelve sods. Loy ploughing took place on very small farms or on very hilly ground, where horses could not work or where farmers could not afford them and were used up until the 1960s in poorer land. This suited the moist climate of Ireland as the trenches formed by turning in the sods provided drainage. It also allowed the growing of potatoes in bogs as well as on mountain slopes where no other cultivation could take place.

Other uses As well as ploughing and ridgemaking, the loy was also used for lifting potatoes and digging turf. Loy digging is still a popular pastime in Ireland with a national Loy Digging Association. Loy digging is an integral part of the National Ploughing Championships.

The loy in culture

Theatre The Playboy of the Western World by Irish playwright John Millington Synge, set in a public house in County Mayo during the early 1900s, tells the story of Christy Mahon, a young man running away from his farm. Mahon claims he killed his father by driving a loy into his head.

Literature Irish writer Declan Hughes' novels centre around the detective Ed Loy, whose name is a homage to Sam Spade, the fictional character of Dashiell Hammett's The Maltese Falcon.

Illustrations

Worked examples

Example 1 — a first encounter with Loy (spade)

Start with the simplest possible case. Write down what Loy (spade) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Loy (spade) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Loy (spade) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Loy (spade)

In research: Loy (spade) appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Loy (spade) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Loy (spade) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 19th century in Ireland, Farming tools, History of agriculture, so understanding it makes those chapters shorter.
In everyday life: Look for Loy (spade) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Loy (spade) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Loy (spade) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Loy (spade) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Loy (spade) in simple terms?

Why does Loy (spade) matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Loy (spade)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Loy (spade).