A particle of mass m = 9 kg s moving along a guide wire with shape given by y(x) = - cos(2.5x) m, where x is in meters. Gravity g = -9.8j m/s^2 acts vertically. At the current instant the particle has x = 11 m and it is moving to the right with a speed of y = 1 m/s, which is increasing at a rate of 2 m/s^2. What is the force F of the wire on the particle?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?