# Answer to Question #54360 in Mechanical Engineering for stewart

Question #54360

if a man who has a mass of 75kg climbs up a mast 32m, calculate the increase in his potential energy in reaching the top. express your answer in kJ to two sig fig and take the acceleration due to gravity to be g=9.8m s^-2

Expert's answer

Given:

m=75 kg

delta_x=32 m

g = 9.8 m/s

deltaE-?

Solution:

deltaE=m*g*delta_x=75*32*9.8=23520 J = 23.52 kJ = 24kJ

Answer is 24 kJ

m=75 kg

delta_x=32 m

g = 9.8 m/s

deltaE-?

Solution:

deltaE=m*g*delta_x=75*32*9.8=23520 J = 23.52 kJ = 24kJ

Answer is 24 kJ

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