A body of mass 80kg moving with a velocity of 6m/s hits a stationery body of mass 40kg. if the two bodies stick together after collision, calculate the magnitude of the velocity

Known :

m1 = 80 kg

v1 = 6 m/s

m2 = 40 kg

Solution :

p1 + p2 = p3

m1 • v1 + m2 • v2 = (m1 + m2) • v

Since body 2 is stationery before collision, then v2 = 0

m1 • v1 = (m1 + m2) • v

(80 kg)(6 m/s) = (80 kg + 40 kg) • v

v = 4 m/s

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

reserve is the answer