You have a light spring which obeys Hooke's law. This spring stretches 2.68 cm vertically when a 3.00 kg object is suspended from it. Determine the following.

(a)the force constant of the spring (in N/m) N/m

(b)the distance (in cm) the spring stretches if you replace the 3.00 kg object with a 1.50 kg object cm

(c)the amount of work (in J) an external agent must do to stretch the spring 6.70 cm from its unstretched position JAdditional Materials