# The kissing circle

by Nal101
Tags: kissing circle
 P: 16 1. The problem statement, all variables and given/known data An object moving at a constant speed of 31 m/s is making a turn with a radius of curvature of 4 m (this is the radius of the "kissing circle"). The object's momentum has a magnitude of 87 kg·m/s. What is the magnitude of the rate of change of the momentum? What is the magnitude of the net force? 2. Relevant equations p = mv $$\Delta$$p = Fnet$$\Delta$$t dp/dt = magnitude of V / R (sry dont know how to put that in latex) 3. The attempt at a solution Question 1: Velocity divided by radius? Using the 3rd equation, but the units dont check out. I am lost Question 2: How do I find t, and afterwards, the answer would be Fnet = 87 (change in momentum) * t (change in time)