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Question

Mechanical advantage of wheel and axle is: (R= radius of the wheel, r = radius of the axle)
  1. R/r
  2. R+r
  3. r/R
  4. Rr

A
R+r
B
R/r
C
r/R
D
Rr
Solution
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Mechanical advantage is the amplification in force due to the use of a machine . The mechanical advantage of wheel and axle is given by
M.A.=R/r

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