Part A A physics student solving a physics problem has obtained the following four equations that describe the physics of a system of
masses connected by a string
(1) mg 3m
(2) -mg cos 0+T - mai
(3) a-09
(4) mag-T-mga
where g 9.80 meter/second and 0 -60 are knowns, and my my, as, as, and T are unknowns. The problem requires
the student to evaluate as Which are the unknowns that the student would like to eliminare from the equations?

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

Choose each of the settings that follow and list them below do it ill mark brainliest first object= position= speed= acceleration= second object= position= speed= acceleration=

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants