What is the gravitational potential energy of a # 12 kg# object on a shelf # 7/8 m # high?

1 Answer
Mar 19, 2018

Answer:

#102.9 \ "J"#

Explanation:

Gravitational potential energy is expressed through the equation,

#"GPE"=mgh#

  • #m# is the mass of the object in kilograms

  • #g# is the gravitational acceleration, which is around #9.8 \ "m/s"^2#

  • #h# is the height of the object in meters

So, plugging in our given values, we get

#"GPE"=12 \ "kg"*9.8 \ "m/s"^2*7/8 \ "m"#

#=102.9 \ "kg m"^2"/s"^2#

We know that #1 \ "kg m"^2"/s"^2=1 \ "J"#, and so we got

#=102.9 \ "J"#