Multiple-concept example 7 discusses how problems like this one can be solved. a 6.00-μc charge is moving with a speed of 8.70 x 104 m/s parallel to a very long, straight wire. the wire is 6.30 cm from the charge and carries a current of 86.0 a. find the magnitude of the force on the charge.

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