The problem states that a 3.4 kg object hangs at one end of a rope that is attached to a support on a car. The car and cruisin' and is accelerating, when it does this, the rope makes an angle of 23 degrees with the vertical. Acceleration of gravity is 9.8 m/s/s and the question is asking for the car's acceleration. A rad diagram for your visual Equations Σf= ma Probably something with trig functions (sin, cos, tan) The first thing I did was multiply the mass 3.2 kg by gravity 9.2 m/s/s That gave me a force of 31.36N, now, how do I use this to find the cars acceleration. I just don't see a correlation.