A child's toy consists of a piece of plastic attached to a spring (Fig. P13.9). The spring is compressed against the floor a distance of 2.00 cm, and the toy is released. If the toy has a mass of 90 g and rises to a maximum height of 65.0 cm, estimate the force constant of the spring.
A child's toy consists of a piece of plastic attached to a spring (Fig. P13.9). The spring is compressed again
using conservation of energy
.5*k*0.02^2=0.09*9.81*0.65
solve for k
k=2*0.09*9.81*0.65/0.02^2
2870 N/m
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