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Particles P and Q of masses 0.4kg and m kg are joined by a light inextensible string over a smooth pulley. When released Q accelerates downward at 2.45ms^-2. Find m.

This is an example of a common Mechanics 1 question. I teach a systematic approach to such questions. Diagram - dram diagram of the pulley set up Label forces on diagram - Tension from string acting vertical...
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Answered by Connor N. • Maths tutor
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Solve the following simultaneous equations: 3x + 5y = -4 and -2x + 3y = 9

Label the equations 1 and 2 We want to make it so the x are the same number - therefore we have to find a common multiple of 2 and 3 - this is 6 Therefore the equations turn into: 1) 6x + 10y = -8 2) -6x + 9...
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Answered by Krishnaa P. • Maths tutor
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What is terminal velocity? (falling bodies)

When an object falls down through a fluid (e.g. water, oil, air..) there are usually two forces acting on it. They are the weight force acting downwards and the drag force acting upwards. The weight force co...
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Answered by George F. • Physics tutor
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To what extent did Elizabeth's authority decline in the years 1589 to 1603?

By the year 1589, Elizabeth was old and increasingly decrepid. She was disillusioned wth those around her and the death of many of her great councillors limited her ability to rule successfully. Furthermore,...
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Answered by Fred B. • History tutor
8791 Views

To what extent were Soviet policies responsible for the outbreak and development of the Cold War between 1945 and 1949?

A question that begins 'To what extent...' is often one of the better questions to answer in an exam paper, as it allows for the expression of your own opinion on the topic. A question such as 'What were the...
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Answered by Freddie R. • History tutor
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