Question

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?

Answer 1

Q = 735 J

Step-by-step 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

`Em_(f)` = Q

Em₀ = Em_{f}

m g h = Q

let's calculate

Q = 30 9.8 2.5

Q = 735 J