Answer to Question #101675 in Classical Mechanics for Ayorinde Joseph

Question

A body of mass 12kg is projected vertically upwards and made a trajectory with base length 8m for 3secs when the body us projected vertically downwards it droped into a cylinder containing a liquid of relative density 0.92 if the distance traveled by the body vertically downwards is given as y = 3t4-4t3-8)m

Find the weight of the body

Density of the body

Answer 1

Given that mass of the object = 12kg

weight of the body$= mg$

a) weight of the body $=12\times 9.8=117.6N$

Now,

Drag force due to liquid

$y=3t^4−4t^3−8$

$\dfrac{d^2y}{dx^2}=36t^2-24t$

The equation written in the last line is not clear, kindly provide the correct data, so that i can provide you the resolution.