Question

A heavy plank of mass 100 kg hangs on three vertical wires of equal length arranged
symmetrically (see figure). Find the tension in the steel wire. All the wires have the same
cross-section. Take the modulus of elasticity of steel to be double that of copper (g = 10
m 5-2).
copper
steel
copper
А
B В
C​

Answer 1

Answer:

here your answer

Explanation:

question : A heavy plank of mass 100 kg hangs on three vertical wires of equal length arranged

symmetrically (see figure). Find the tension in the steel wire. All the wires have the same

cross-section. Take the modulus of elasticity of steel to be double that of copper (g = 10

m 5-2).

copper

steel

copper

А

B В

C​

Answer:lol

Answer 2

Explanation:

A homogeneous block with a mass m hangs on three vertical wires of equal length arranged symmetrically. Find the tension of the wires if the middle wire is of steel and the other two are of copper.All the wires have the same cross-section. Consider the modulus of elasticity of steel to be double than that of copper.

216946

Hard

Answer

Given : ΔL

s

=ΔL

c

Y

s

=2Y

c

L

s

=L

c

Using Y=

AΔL

TL

⟹ΔL=

AY

TL

∴ ΔL

s

=

A

s

Y

s

T

s

L

s

and ΔL

c

=

A

c

Y

c

T

c

L

c

But ΔL

c

=ΔL

s

i.e

A

s

(2Y

c

)

T

s

L

s

=

A

c

Y

c

T

c

L

c

⟹ T

s

=2T

c

Also 2T

c

+T

s

=mg

OR 2T

c

+2T

c

=mg ⟹T

c

=

4

mg

⟹ T

s

=

2

mg