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# AQA Mechanics Question on Tension and Weight watch

1. A particle of weight W newtons is held in equilibrium by two light strings, each inclined at an angle a to the vertical. Show that the tension in each string is W/2cos a.
2. (Original post by Jack_Beynon)
A particle of weight W newtons is held in equilibrium by two light strings, each inclined at an angle a to the vertical. Show that the tension in each string is W/2cos a.
First things first, draw a (big) diagram

Then, try considering the forces acting on the particle (a second free body force diagram may be helpful here).
3. (Original post by Jack_Beynon)
A particle of weight W newtons is held in equilibrium by two light strings, each inclined at an angle a to the vertical. Show that the tension in each string is W/2cos a.
After drawing a force diagram you can note that it is in equilibrium.

Using this I woud suggest resolving forces on the particle verticaly; post your working if you get stuck.
4. Thanks everyone that helped. I've now solved this problem.

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Updated: January 24, 2017
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