(Solved): Q4 help A painter is halfway up a \( 10-\mathrm{m} \) ladder when the bottom starts sliding out from ...

A painter is halfway up a \( 10-\mathrm{m} \) ladder when the bottom starts sliding out from under him. Know that point \( A \) has a velocity \( \mathrm{v}_{A}=2.8 \mathrm{~m} / \mathrm{s} \) directed to the left when \( \theta=60^{\circ} \). Determine the velocity of the painter. The velocity of the painter is \( -(\quad \mathrm{m} / \mathrm{s}) \mathrm{i}-(\mathrm{m} / \mathrm{s}) \mathrm{j} \).