What is the kinetic energy of an object with a mass of #15 kg# that has been in freefall for #18 s#?

1 Answer
May 11, 2016

Answer:

#E_k=2.3385372*10^5J#

Explanation:

#h=1/2*g*t^2#

#E_k:"the kinetic energy of object"#
#E_p:"the potential energy of object"#

#E_k=E_p#

#E_k=m*g*h#

#E_k=m*g*1/2*g*t^2#

#E_k=1/2*m*g^2*t^2#

#E_k=1/2*15*(9.81)^2*18^2#

#E_k=233853.72 J#

#E_k=2.3385372*10^5J#