Question

answer this too plzz

Answer 1

hope this helps you.

Answer 2

WORK DONE= FORCE*DISPLACEMENT

                     =Mass*Acc*Dis (here, the acceleration is due to gravity)

                     =Vol.*density*Acc*Dis (m=vol.*density)

sub the values,

1600= 10*d*10*40

density= 0.4grams/m³