Anewly-discovered planet ("kardashia") has a mass exactly 4.0 times that of earth. a particle on the surface of kardashia has the same weight that it would have on the surface of earth. determine the radius of kardashia, in terms of the radius of earth (re ).a) .5 reb) 2 rec) 2.5 red) 3 ree) 3.5 re

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600