Question

Two manned satellites approaching one another at a relative speed of 0.300 m/s intend to dock. The first has a mass of 3.50 ✕ 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. m/s (b) What is the loss of kinetic energy in this inelastic collision? J (c) Repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity m/s loss of kinetic energy J

Answer 1

Here ,

m1 = 3500 Kg

m2 = 7500 Kg

u = 0.30 m/s

let the final velocity is vf

Using conservation of momentum

3500 * 0 + 7500 * 0.30 = (3500 + 7500) * vf

vf = 0.205 m/s

the final velocity after docking is 0.205 m/s

b)

loss of kinetic energy in this inelastic collision = initial kinetic energy -final kinetic energy

loss of kinetic energy in this inelastic collision = 0.5 * 7500 * 0.30^2 - 0.5 * (3500 + 7500) * 0.205^2

loss of kinetic energy in this inelastic collision = 106.3 J

the loss of kinetic energy in this inelastic collision is 106.3 J