physics quiz

what does an energy bar graph represent?

visually represents the amount of energy involved in transformations and movement in a scenario

which of the following best defines mechanical energy?

sum of potential and kinetic energy of an object(s)

what factors determine the gravitational potential energy of an object?

its position relative to the earth, mass, and height of an object

what happens to an object’s kinetic energy when its speed doubles?

quadruples

the law of conservation of energy states:

energy cannot be created or destroyed, only transformed.

which of the following statements defines work in physics?

the amount of force causing motion. energy is transferred to/from an object with force along a displacement.

which of the following describes power?

how quickly work is done. power is how fast or slow work is done over time. power = work/time

how is efficiency best described in a real-world system?

comparing useful energy output to total energy input. the percent of energy used effectively for action compared to total energy put in.

which of the following best describes elastic potential energy?

energy stored in an object when its stretched or compressed

explain what an energy bar graph represents and how it can be used to understand energy transformations in a system

model that represents energy transformation and movement of an object. helps visualize energy transformations like potential to kinetic energy as a ball falls down a cliff.

Law of conservation of energy… how would you apply this principle to explain the energy transformations in a roller coaster?

in a roller coaster, there are many potential and kinetic energy transformations. as the roller coaster goes up the track, potential energy is being transformed from kinetic, and as it falls down kinetic energy is transformed from potential.