Question

A body of mass 2 kg moves 30 metre against a frictional force of 100 newton If the work is completely converted into heat, the rise in temperature of the body due to the absorption of heat is ________.
(sp heat=600J/kgK)​

Answer 1

Answer:

Let’s assume that all energy is converted to heat energy. Also, let’s ignore effects of drag due to the atmosphere. Water dropped from height ‘H’ reaches the surface and its temperature is needed to be determined. Essentially, this is a problem of Law of Conservation of Energy. The potential energy due to gravity is converted to heat energy. Heat energy of a substance is:- ms(dt)

where,

m-mass of substance

s- specific heat capacity