Each of the following vectors is given in terms of its x and y components. Find the magnitude of each vector and the angle it makes with respect to the +x axis. Ax = -2, Ay = -7.Find the angle this vector makes with respect to the +x axis. Use value from -180∘∘ to +180 ∘∘. (Express your answer to two significant figures.)

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.