Question

A piece of ice its mass is 2.5 kg and at 0.0 C temperature , it is crawling on the ground with 5.7 m/s , what is the mass of the melted ice , if we know all of the kinetic energy of the ice turn into the internal energy (of the ice ) , that we need 3.3 X 10^5 J to melt 1.0 kg ice ?


Thanks a lot

Answer 1

Heatmelting=KE
m*3.3E5=1/2 *2.5*5.7^2
solve for mass m

Answer 2

But I can't understand that solution , I mean where is it from :(( m*3.3E5= )) ?

Answer 3

We have this main law :
dPE + dkE + dU = 0
but what about the potential energy (dPE) ?