Question

50. A crowbar is of length 3 m. Where should the ful-
crum be placed along the length of the crowbar so
that a boulder of 9 kgwt be lifted with it by applying
an effort of 10 N? (g = 10 ms?)

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Answer 1

Answer:

Explanation:

Here's the hint for you:-

Given length of the crowbar.=3m.

Find the value of the effort from given data.

Find the value of the load from the given data.(You should convert it into S.I. Units)

Now,  

load x load arm=effort x effort arm-----(1)

Substitute the values of load and effort.

Find the ratio of the load arm to effort arm from eq ---(1)

Here,  

load arm + effort arm= 3 m.--------(2)

Hope this helps.

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