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A 2.4 m long plank of mass 20kg has 2 pins, each 0.5 meters from each respective plank end. A person of mass 40kg stands on the plank 0.1m from one of the pins. Calculate the magnitude of reactions at the pins for this structure to be in equilibrium.

1.) draw what is happening: 2.)Notice key points of questions: Plank is in equilibrium . This means that all forces=0 and all moment=03.) Apply force equilibrium: 4.) Apply moment equilibrium5.) final answer...
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Answered by Samuel T. • Maths tutor
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explain the effect of a rise in government expenditure in the AD-AS framework

A rise in government expenditure shifts the aggregate demand to the right (Insert graph). We assume that there is no change to the aggregate supply and that this is a one time increase. In the short-run both...
CA
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The Treaty of Versailles was the main reason behind World War II. Discuss

For essay questions it is important to carefully read the question. Some elements are the key to answering the question. Here discuss and the main reason are essential. "Discuss" implies providing ...
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Answered by Caroline A. • History tutor
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Explain two differences between procedural memory and episodic memory. (2017 AQA exam question)

The first difference is that procedural memory is our memory of an action, or skill. For example, how to ride a bike, drive a car, swim. Whereas episodic memory is the ability to recall specific events (epis...
TL
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How does Tennessee Williams present masculinity in A Streetcar Named Desire?

In A Streetcar Named Desire, Williams presents a kind of ‘crisis of masculinity’ in working class post-WWII America. Through the characters of Stanley and Mitch (both war veterans), masculinity is presented ...
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Answered by Daisy G. • English tutor
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