If an object has a mass of 50 kg on earth, what would be the object’s mass on a planet with half the gravity of that on earth (g=9.8 m/s2)? a. 100
b. 25
c. 245
d. 10.2
e. 50

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