You should be good.
PE = mgh
so h = PE/mg = 2.14e3/(9.8*81.6) = 2.67
for child
PE = 1836*9.8*2.67 = 487.8 J
When an 81.6 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.14E+3 J. By how much does the potential energy of a 18.6 kg child increase when the child climbs a normal staircase to the second floor?
I know PE=mgh but I keep getting the wrong answer. please help. Thanks!
1 answer