Question

1. which of the following is an example of a non - conservative force?

the force of air resistance on a parachute slowing a skydiver after they jump from a plane.
the force of an elastic to keep socks from falling down.
an electric force causing a lamp to turn on.
the force of gravity pulling a skydiver to the ground.

Explanation:

Non-conservative forces dissipate mechanical energy (into heat, sound, etc.) and work done depends on the path taken. Air resistance converts kinetic energy into thermal energy, fitting this definition. Elastic force, electric force, and gravity are all conservative forces, where work done is path-independent and mechanical energy is conserved.

Answer:

The force of air resistance on a parachute slowing a skydiver after they jump from a plane.