Question

Rank the energy dissipated by friction in each case.

Answer 1

The energy dissipated by friction can be ranked based on the magnitude of the values given. The greater the absolute value of the energy dissipated, the higher it should be ranked.

Step-by-step explanation:

The question asks us to rank the energy dissipated by friction in various situations. Energy dissipation by friction is a concept in physics where mechanical energy is converted into heat energy due to the resistance between surfaces in contact. The amount of energy dissipated by friction can be determined through calculations involving the work done by frictional forces, which is often negative since it acts in the opposite direction of movement. The energy dissipated by friction can be ranked based on the magnitude of the values given. The greater the absolute value of the energy dissipated, the higher it should be ranked. Here is the ranking in ascending order:

1. Energy dissipated by friction: -0.600 J
2. Energy dissipated by friction: 0.123 m
3. Energy dissipated by friction: 0.300 J

It is important to note that the negative sign indicates that energy is being lost or dissipated.

Answer 2

Energy dissipated by friction is compared by looking at the work done by friction and its conversion to heat. A spring compression difference indicates energy loss due to friction. For a car on a hill, missing kinetic energy transformed into potential energy is attributed to friction.

Step-by-step explanation:

The energy dissipated by friction in various scenarios can be compared by considering the work done by friction and the energy converted to heat. In one example, a box sliding on a rough surface loses energy due to friction and compresses a spring less than it would on a frictionless surface, indicating energy loss. The difference in the compression distances can be used to calculate the amount of energy dissipated due to friction. In another example, a car coasting up a hill will have a certain amount of its kinetic energy converted to potential energy, with any missing energy likely dissipated as heat due to friction.

Specifically, when a box with a total energy of 50 J slides on a rough surface and only compresses a spring a distance of 15 cm compared to 25 cm on a frictionless surface, the energy lost to friction can be determined. Furthermore, analyzing a car's ascent up a hill and the energy converted to heat by friction involves examining the difference between the initial kinetic energy and the final potential energy.