# Which calculation should i use?@_@

1. Aug 6, 2010

### shakie_ija

which calculation should i use??@_@

1. The problem statement, all variables and given/known data
a 1.4 kg bottle of milk is lying horizontally in the rack. the two surfaces on which the bottle rest r 900 apart, and the right surface makes an angle of 450 with the respect to the ground. each surface exerts a force on the bottle that is perpedicular to the surface. determine the magnitude of each of these forces
* the bottle is lying 90 degree vertically

2. Relevant equations

f=ma?
w=mg?
or should i find the resultant force by using cos and sine

3. The attempt at a solution
ive tried..but all the answer are different..

2. Aug 6, 2010

### Staff: Mentor

Re: which calculation should i use??@_@

Call the force exerted by each surface on the bottle F. What other forces act on the bottle? What's the net force on the bottle? Consider vertical components.

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