Two children fight over a 200g stuffed bear. the 25kg boy pulls to the right with a 15n force and the 20kg girl pulls to the left with a 17n force. ignore all other forces on the bear (such as its weight). whats the magnitude? .

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