Someone please help me with physics question?

Posted on 2014-12-15 07:22:00 in Physics by VERONI

A child s pogo stick (figure below) stores energy in a spring (k = 2.6 104 N/m). At position circled A (x1 = -0.100 m), the spring compression is a maximum and the child is momentarily at rest. At position circled B (x = 0), the spring is relaxed and the child is moving upward. At position circled C, the child is again momentarily at rest at the top of the jump. Assume that the combined mass of child and pogo stick is 28.0 kg.

(a) Calculate the total energy of the system if both potential energies are zero at x = 0.
J

(b) Determine x2.
m

(c) Calculate the speed of the child at x = 0.
m/s

(d) Determine the value of x for which the kinetic energy of the system is a maximum.
mm

(e) Obtain the child s maximum upward speed.
m/s

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