Being able to calculate tension is an important skill not just for physics students but also for engineers and architects, who, to build safe buildings, must know whether the. Centripetal force (Fc) is equal to m × v2/r where "m" is mass, "v" is velocity, and "r" is the radius of the circle that contains the arc of the object's motion. What is the tension in the rope ? Since the sled is moving with a constant velocity, the net force on the sled must be zero. Decomposing the net force into its components along the x-axis and the y-axis, we obtain the following equations of force: The second equation can be used to eliminate N: Substituting this expression in . Feb 29, 2016 . Video created by University of Houston System for the course "Preparing for the AP Physics 1 Exam". Topics include kinematics and dynamics of circular motion, Newton's law of universal law of gravitation, and applications of topics. You will. The force laws allow us to calculate the force acting on a body from the properties of the body and its environment. The laws of motion are subsequently used to calculate the acceleration of the object under influence of the force. In this course we will be discussing the laws of motion obtained by Newton. This is called . Sep 29, 1999 . When an object is experiencing uniform circular motion, it is traveling in a circular path at a constant speed.. Adding forces in the y direction gives:. In the x direction there's just the one force, the horizontal component of the tension, which we'll set equal to the mass times the centripetal acceleration:. A puck is traveling at a constant speed around a circle on a table. What would we have to know to find the tension in the string? •Tension is the centripetal force ( keeps motion in a circular path). •Centripetal acceleration a c. = v2 / r. •Mass of the body (F c. =ma c. ) so that T=ma c. T . For circular motion at constant speed, the velocity is always tangential to the circular path, and therefore its direction is continuously changing even though its therefore to use coordinates that are horizontal and vertical, and in the force diagram Fstring has been resolved into its horizontal and vertical components. A free . Nov 17, 2006 . Thus, the y-hat component of force must = 0. Thus, the y-hat component of tension must equal mg. Thus, the tension vector must be at some angle up and to the left. twotaileddemon said: ii) Explain why it is not possible for the ball to swing so that the cord remains exactly horizontal. It is not possible to swing . Sep 3, 2013 . Example 9.4 Tension in a Rope .. (circular motion). (9.1.3). For the special case of uniform circular motion, d2θ / dt2 = 0 , and so the sum of the tangential components of the force acting on the object must therefore be zero,. F. We can apply this Universal Law of Gravitation to calculate the period of the.