science

Little Joe 2

Little Joe 2 is a science 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 Little Joe 2 rather than just read about it. In short: The Little Joe 2 was a test of the Mercury space capsule, carrying the rhesus monkey Sam (Macaca mulatta) close to the edge of space. He was sent to test the space equipment and the adverse effects of space on humans.

Key takeaways

Little Joe 2 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Little Joe 2 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Little Joe 2 from memory before moving on to harder problems.

Reference excerpt

The Little Joe 2 was a test of the Mercury space capsule, carrying the rhesus monkey Sam (Macaca mulatta) close to the edge of space. He was sent to test the space equipment and the adverse effects of space on humans. The flight was launched December 4, 1959, at 11:15 a.m. ET from Wallops Island, Virginia, United States. Little Joe 2 flew to an altitude of 55 miles (88 km). It was recovered with the monkey intact and alive in the Atlantic Ocean by the USS Borie. Sam was one of a series of monkeys in space. Sam, from the School of Aviation Medicine in San Antonio, Texas, received his name as an acronym of the facility. Sam experienced up to 12Gs and three minutes of weightlessness. The flight time was 11 minutes, 6 seconds, with a payload of 1,007 kg. The boilerplate Mercury spacecraft used in the Little Joe 2 mission is currently displayed at Airpower Park and Museum, Hampton, Virginia.

See also Little Joe (rocket) Miss Sam, NASA Project Mercury rhesus monkey Albert II, rhesus monkey who became the first primate and first mammal in space on June 14, 1949 Splashdown List of individual monkeys

References This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration.

Illustrations

Worked examples

Example 1 — a first encounter with Little Joe 2

Start with the simplest possible case. Write down what Little Joe 2 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Little Joe 2 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 Little Joe 2 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 Little Joe 2

In research: Little Joe 2 appears in science 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 Little Joe 2 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: Little Joe 2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1959 in spaceflight, Project Mercury, so understanding it makes those chapters shorter.
In everyday life: Look for Little Joe 2 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 Little Joe 2 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Little Joe 2 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 Little Joe 2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Little Joe 2 in simple terms?

Why does Little Joe 2 matter?

Because it connects several science 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 Little Joe 2?

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 Little Joe 2.