Question

A) Numericals:
1) A man can crack a nut by applying a force of 100 N on a lever of length 0.4 m. What should be the length of
lever if he wants to use a force of 50 N to crack the nut?
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Answer 1

Effort arm = ?

Effort = 75 N

load = 100 N

load arm = 0.5 m =50 cm

 

E f f o r t space cross times e f f o r t space a r m space equals space l o a d space cross times l o a d space a r m space

E f f o r t space a r m space equals fraction numerator space l o a d space a r m space cross times l o a d space over denominator e f f o r t end fraction

S u b s t i t u t i n g space a l l space t h e space v a l u e s space w e space g e t

E f f o r t space a r m space equals space fraction numerator 100 space cross times space 50 over denominator 75 end fraction

E f f o r t space a r m space equals space 66.6 space c m

 

So to apply the force of 75 N length of nut cracker should be 66.6 cm.

Answer 2

Answer:

50n and 0.4 m ggddfgghtf