I have to find the centripetal force and velocity of an object being swung around on a string that is attached to a weight (starting at 200 grams up to 1100 grams). The length of the string (radius) that is swinging the object is .5 meters. I have the times for each mass (200g-1100g). How would I approach this problem? To find the velocity, would I use the equation V=d/t, where "d" is the .5 meters and "t" is the time it takes for the object to be swung around once, or should I use the equation Fc=m(v^2/r), where "Fc" is the weight (Fg), mass is the weight, and radius is the string distance of .5 meters? Plus, I need to make 2 graphs the data where "Fc" is the y-axis and "v" is the x-axis and it has to be a parabola and "Fc" is the y-axis and "v^2" is the x-axis and it has to be a straight line like this - /. Can anyone help me?