A light spring obeys Hooke's law. The spring's unstretched length is 32.0 cm. One end of the spring is attached to the t

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A Light Spring Obeys Hooke S Law The Spring S Unstretched Length Is 32 0 Cm One End Of The Spring Is Attached To The T 1 (45.67 KiB) Viewed 69 times

A light spring obeys Hooke's law. The spring's unstretched length is 32.0 cm. One end of the spring is attached to the top of a doorframe and a weight with mass 7.25 kg is hung from the other end. The final length of the spring is 40.0 cm. (a) Find its spring constant (in N/m). 888.125 N/m (b) The weight and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 190 N. Find the length (in m) of the spring in this situation. 0.748 X It seems you have used 2(190 N) in your calculation. F refers to the magnitude of the force the spring exerts on each end. In this case, F is the force one person exerts on one end of the spring, m (c) What If? What would be the length (in m) of the spring if it were now attached to the vertical portion of the doorframe and stretched horizontally by a single person exerting a force of 190 N? 0.214 If a person exerts a force Fat one end of the spring, given the spring is not accelerating, what must be the force that the doorframe exerts on the spring at the other end? Can you make an analogy to the situation in part (b)? m