A0.335 kg mass is attached to a spring and executes simple harmonic motion with a period of 0.38 s. the total energy of the system is 2.1 j. find the force constant of the spring. answer in units of n/m.

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?