Answer:
The force is [tex]E = 117 \ N[/tex]
Explanation:
From the question we are told that
The mechanical advantage is [tex]ME = 15[/tex]
The load is [tex]L = 1750 \ N[/tex]
The height is [tex]h = 7 \ m[/tex]
Generally mechanical advantage is mathematically represented as
[tex]ME = \frac{L }{E }[/tex]
Here E is the force that must be applied to move the piano
=> [tex]E = \frac{L}{ ME }[/tex]
=> [tex]E = \frac{1750 }{15 }[/tex]
=> [tex]E = 117 \ N[/tex]
