Question

a physics book has a height of 26cm, a width of 23cm, and a thickness of 3.9cm.
what is the density of the physics book if it weighs 17N? the acceleration of gravity is 9.81m/s^2.
answer in units of kg/m^3


i know density=mass/volume
but it says to answer in units of kg/m^3... so what do i need to convert??

Answer 1

weight=17N
mg=17N
mass=17N/g

density=mass/volume
I would convert all the dimensions to meters, so the volume is in meter cubed.