Question

TEL
A cook uses a fire tong of length 32 cm to lift a piece of hot coal of
mass 250 g. If he applies his effort at a distance of 8 cm from the
fulcrum. What is the effort in Si unit? (g = 10ms-2)
​

Answer 1

Answer:

and the distance from the object to the principal focus is p. The ratio of the size of the real image to the size of the object is:

A .

−pf

B .

(pf)2

C .

(pf)21

D .

−fp

E .

−fp

December 20, 2019Apoorva Vedwal

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ANSWER

Distance of object is u=−(f+p)

v1+u1=f1 gives:

v1−f+p1=−f1

or, v1=−f1+f+p1

or, v1=−(f+p)×fp

or, v=Fpp er