A $2\mathrm{.}5$ g penny is dropped from the top of the Empire State Building, falling $381$ m to the sidewalk below. If the penny experiences almost no air resistance as it falls $($very unrealistic!$),$ find how fast it's traveling half of the building before hitting the sidewalk.

Answer rating: 100% (QA)

To find the speed of the penny when it reaches halfway down the building we can use the principle of ... View the full answer