Physics

Problem

5.0\,\text{kg}

solid object (density

2.5\times10^{3}\,\text{kg}\,\text{m}^{-3}

) is fully submerged in water and attached to a spring scale. While the object is being lifted straight upward, the scale reads

40\,\text{N}

. What is the magnitude of the object’s upward acceleration at that instant? a)

1.8\,\text{m}\,\text{s}^{-2}

5.7\,\text{m}\,\text{s}^{-2}

2.1\,\text{m}\,\text{s}^{-2}

8.0\,\text{m}\,\text{s}^{-2}