The only thing you need to know in order to solve this task is that <span>plank length (which is force x), should equal the increase in potential energy, so what we have now : (mass)* g * (height).
It has to look like that: </span>
<span>F * 3.0 = 150 x 9.81 x 1.20
Then solve for F, the result should be in newtones = 588N
Do hope it makes sense.</span>
The physical law that explains that is the law of conservation of energy which states that he energy of an isolated sistem remains constant
D all of the above applies to the functions of the nervous system.
Feet and inches or millimeters or centimeters or meters or miles or kilometers
