Asked by Godfrey

A girl runs up a stairway that is 6m high with a 500g book, her mass is 70kg. Take g=10m/s2 calculate (a) weight of the book (b) weight of the girl (c) the total work done by the girl when she reaches the top
Answered by bobpursley
g is not 10m/s^2 anywhere on this Earth. I have never understood why teachers do that...do they think students are stupid and can only use whole numbers (500g, 70kg, 10m/s^2)?

weightofbook= mass*g
weight of girl= mass*g
work= (massbook+massgirl)g*6 joules
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