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Edited by Kerrah: 2/11/2013 11:26:56 PM
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Maths (Mechanics Help)

[url]http://i49.tinypic.com/2vvmlbt.jpg[/url] I'm stuck on these questions based on inclined planes and pulley systems z.z I'm ok with question 1 on impulses and change in momentum, but the rest is just gwaah. Help would be appreciated

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  • Edited by Trollheim: 2/12/2013 12:05:15 AM
    Ok Part E, ok, when P hits the ground, Q is still moving upward. The problem then becomes like throwing a ball up in the air - the ball goes up, and then must come back to where it started. The left mass hit the ground at 1.5 seconds, so the right mass becomes a ball thrown up in the air at 1.5 seconds. It had been accelerated at a rate of 2.8 m/s^2 for 1.5 seconds, so we need to calculate its velocity. Once we know its velocity, it simply becomes a problem of determining how long the ball is in the air. (What I had before about determining velocity I believe is wrong, I don't remember the equation off the top of my head and don't want to confuse you with calculus, look the formula up yourself).

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