determining when gravitational potential energy is present\nin which situations is gravitational potential…

determining when gravitational potential energy is present\nin which situations is gravitational potential energy present? check all that apply.\n□ a person walks up a flight of stairs.\n□ a person runs across a room.\n□ wind blows against a steel table anchored to the ground.\n□ wind lifts a balloon into the air.\n□ a weightlifter holds a barbell on the ground.\n□ a weightlifter holds a barbell straight overhead.

determining when gravitational potential energy is present\nin which situations is gravitational potential energy present? check all that apply.\n□ a person walks up a flight of stairs.\n□ a person runs across a room.\n□ wind blows against a steel table anchored to the ground.\n□ wind lifts a balloon into the air.\n□ a weightlifter holds a barbell on the ground.\n□ a weightlifter holds a barbell straight overhead.

Answer

Brief Explanations:

Gravitational potential energy is given by $U = mgh$, where $m$ is mass, $g$ is gravitational - acceleration and $h$ is height. It exists when an object has a non - zero height above a reference level. A person walking up stairs gains height, so has gravitational potential energy. Wind lifting a balloon into the air increases the balloon's height, giving it gravitational potential energy. A weightlifter holding a barbell straight overhead has the barbell at a non - zero height above the ground, so there is gravitational potential energy.

Answer:

A person walks up a flight of stairs. Wind lifts a balloon into the air. A weightlifter holds a barbell straight overhead.