A cubic object of mass is released from rest while fully submerged in water

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

A cubic object of mass

0.50\,\text{kg}

is released from rest while fully submerged in water. Immediately after release, the object accelerates upward at

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

. What is the density of the material from which the object is made? (a)

6.9\times10^{2}\,\text{kg}\,\text{m}^{-3}

(b)

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

(c)

7.6\times10^{2}\,\text{kg}\,\text{m}^{-3}

(d)

3.1\times10^{2}\,\text{kg}\,\text{m}^{-3}