# Engineering science

a 50kg mass is suspended from a spring, causing it to extend by 30mm. calceolate the spring stiffness?

The mass is then pulled down a distance of 90mm and released. calculate the frequency of the resulting motion, assuming that this is simple harmonic, calculate the velocity of the mass as it reaches a point 20mm below the highest point of its motion? what is its maximum acceleration?

mg = kx = k = mg/x = 50 x 9.81/0.03 = 16350n/m

t= 2pi sqrt m/k = 2pi sqrt 50/16350 = 0.347sec...

calculated the stiffness any help on the other questions?

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