There is a guy a ride. The combined mass of the man and the swing is 200kg and the legnth of the string the pulls him around in a circle is. 12.0m the string makes an angle of 65 degrees. Find the force that moves him in this circular motion and find the speed he is moving at. I am kind of lost since I do not know how to find the period or anything. This is a A.P. Physics class in highschool without the use of calculus.