An unstrained horizontal spring has a length of 0.31 m and a spring constant of 220 n/m. two small charged objects are attached to this spring, one at each end. the charges on the objects have equal magnitudes. because of these charges, the spring stretches by 0.022 m relative to its unstrained length. determine (
a. the possible algebraic signs and (
b. the magnitude of the charges.

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?