An object with a mass of #4 kg# is hanging from a spring with a constant of #2 (kg)/s^2#. If the spring is stretched by # 18 m#, what is the net force on the object?

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Answer 1 · 2017-06-02T14:49:01

The net force is #=3.2N# acting downwards

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Mass of object #m=4kg#

The spring constant is #k=2kgs^-2#

Extension of the spring is #x=18m#

Resolving in the vertical direction #uarr^+#

The net force is #F=2*18-4g#

#=36-4g=-3.2N#

There is a net force of #3.2N# acting downwards