If you slide down a rope, it's possible to create enough thermal energy to burn your hands or your legs where they grip the rope. Suppose a 30 kg child slides down a rope at a playground, descending 2.5 m at a constant speed. How much thermal energy is created as she slides down the rope?

    Q = 735 J

Explanation:

In this exercise we must assume that all the mechanical energy of the system transforms into cemite energy.

Initial energy

        Em₀ = U = m g h

final energy

        = Q

        Em₀ = Em_{f}

        m g h = Q

let's calculate

        Q = 30  9.8  2.5

        Q = 735 J

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.