2. A Gas dor 2 os.
with
an Ampitude os
otom se slow it sa
Amontude Is noved what happen !
to its, A period, 3 reque non & Anviar reaunchy
Total mechanical energy
speed
speed at x = = 2
poten than 3 kinetic energys at -
B​

W = weight of the body in air = 160 N

ρ' = density of body

V = volume of the body

weight of the body in air  is given as

W = ρ' V g                                       eq-1

W' = weight of the body in liquid = 120 N

force of buoyancy is given as

F = W - W'

F = 160 - 120

F = 40 N

ρ = density of liquid = ?

force of buoyancy is given as

F = ρ V g                                               eq-2

dividing eq-1 by eq-2

160/40 =  ρ' V g /(ρ V g )

4 =  ρ' /(0.8 )

ρ' = 3.2

(b)3.2