For the meter stick shown in figure 10-4, the force f1 10.0 n acts at 10.0 cm. what is the magnitude of torque due to f1 about an axis through point a perpendicular to the page? is it clockwise, or is it counterclockwise? show your work and give correct units.

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