A spring of stiffmess 129 N/m, and with relaxed length 0.23 m, stands vertically

Question

A spring of stiffmess 129 N/m, and with relaxed length 0.23 m, stands vertically on a table, as shown in the figure. Instead of compressing the spring with a heavy block, with your hand you push straight down on the spring until your hand is only 0.17 m above the table. (Assume that the positive y-axis points upward and is normal to the table.) longth Push down (a) what is now the vector L, with the spring compressed (b) What is the magnitude of L (c) What is the unit vector (d) What is the stretch, s, including the correct sign

Explanation / Answer

a) vector L bar = 0.17 m j hat

b) magnitude of L is 0.17 m

c) unit velctor L is j hat

d) stretch is s = 0.17-0.23 = -0.06 m

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