Physics Help Forum Another circular motion question

 Periodic and Circular Motion Periodic and Circular Motion Physics Help Forum

 Apr 1st 2017, 11:34 AM #1 Junior Member   Join Date: Mar 2017 Posts: 5 Another circular motion question Hi, I've got another question. question and diagram - https://ibb.co/daf21F Im doing question 2aiiia I thought that since radial force = mv²/r = 64m N and the transverse force = m*angular acceleration = 0, The magnitude and direction of the force is 64m N towards the centre. However, according to the book the answer is 73.8m N towards the centre. Where have I gone wrong?
 Apr 1st 2017, 01:28 PM #2 Senior Member     Join Date: Aug 2008 Posts: 113 $F_c = F_r - mg \implies \dfrac{mv^2}{r} = F_r - mg \implies F_r = \dfrac{mv^2}{r}+mg$ $F_r = m\left(\dfrac{v^2}{r} + g\right)$ recalculate ...
 Apr 2nd 2017, 01:48 AM #3 Junior Member   Join Date: Mar 2017 Posts: 5 Thanks skeeter.

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