Question

when one meter
wire of
diameter 4mm
is loaded in 25 kg
weight, it is found to be de
entended by 2cm. Calculate
young's
modulus for the wire?
​

Answer 1

Explanation:

Given,

g=9.8m/s

2

m=8kg

l=4m

D=2mm

r=1mm=1×10

−3

m

Y=2×10

11

Nm

−2

Young's modulus of the iron wire,

Y=

Δl/l

F/A

Δl=l

Yπr

2

mg

Δ=4×

2×10

11

×3.14×(1×10

−3

)

2

8×9.8

Δl=0.5mm

Answer 2

Answer:2+2

Explanation:4