1. The potential energy of a system of two particles separated by a distance r is given by the equation below, where A is a positive constant. U(r) = (A)/(r^11) Find the radial force vector F that each particle exerts on the other. (Use any variable or symbol stated above as necessary.) |vector F | = I already tried (11A/r^12) vector r and also tried (11A/r^12) vector r.
2. A single conservative force acts on a 4.90-kg particle within a system due to its interaction with the rest of the system. The equation Fx = 2x + 4 describes the force, where Fx is in newtons and x is in meters. As the particle moves along the x axis from x = 1.02 m to x = 6.60 m, calculate the following. (a) the kinetic energy the particle has at x = 6.60 m if its speed is 3.00 m/s at x = 1.02 m