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# CIE Further Maths Applied watch

1. o/n/03 question 3

Can help?

Attached Images

2. you need to work out the kinetic energy at the lowest point of the small circle ( although the particle is higher than that when it begins this small circular motion ).

then recall that for completion of a circle the string must remain taut at the top... for this to happen it can be shown that the speed at the lowest point of the ( small ) circle must be not less than the square root of 5gr where r is the radius of the small circle

good luck

the bear

3. Can show the full solution? Thanks a lot
4. Attached is a full handwritten solution to question 3.

I cannot say the solution is 100% error-proof.

However I do not understand from B to C (Refer to the solution attached) , the mechanical energy at C, it has r-0.5r cos(alpha)+0.5r
as the height.

Can explain?
Attached Images
5. Question 3 Solution.pdf (538.1 KB, 96 views)

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