The mass m1 is 4 kg. There is friction on the surface. When released, mass m2 will acceleration downward. 1.What tension force makes the acceleration of mass m1 equal to 3 m/s/s?
2.What mass m2 makes the acceleration of mass m2 equal to 3 m/s/s?

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?