Question

a 60 kg block hangs from a wire that has a Cron sectional area of 2 mm square the wire was originally 4 m long but stretches 3 cm under a road what is the young modulus of the wire​

Answer 1

Answer:

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>>A steel wire is 1 m long and 1 mm^2 in a

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A steel wire is 1 m long and 1 mm

2

in area of cross-section. If it takes 200 N to stretch this wire by 1 mm, how much force will be required to stretch a wire of the same material as well as diameter from its normal length of 10 m to a length of 1002 cm?

Medium

Solution

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Correct option is C)

Y=

dl/l

F/A

Y=

1

1×10

−3

1×10

−6

200

Y=2×10

11

N/m

2

thenY=

(

10

2×10

−2

)

1×10

−6

F

2×10

11

=

2

F

×10

9

F=400N