Question

A 2.80 kg mass is dropped from a height of 4.50 m. find its potential energy(PE) at the moment it is dropped. PLEASE HELP

Answer 1

The answer to your question is: PE = 123.6 J

Step-by-step explanation:

Data

mass = 2.80 kg

height = 4.50 m

potential energy = PE = ?

gravity = g = 9.81 m/s²

Formula

`Ep = mgh`

Substitution

PE = (2.80)(9.81)(4.50)

PE = 123.6 J

Dimensional analysis

=
`(kg)/(1) (m)/(s^(2) ) (m)/(1)`

= Newton meter

= Joule = J