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A Level Physics Questions Topic - Materials
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rezwan10
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Q1)
A sample of wire has a Young modulus E. A second sample of wire made from an identical
material has three times the length and half the diameter of the first sample.
What is the Young modulus of the second sample of wire in terms of E?
A) 0.25E
B)E
C)6E
D)12E
A steel wire has a cross-sectional area 0.5 mm2
. The Young modulus of steel is 2.0 × 1011 Pa.
Assume the wire obeys Hooke’s law.
What load must be suspended from the wire to produce an extension which is 0.1% of the
original length?
A) 40N
B)50N
C)100N
D)200N
A sample of wire has a Young modulus E. A second sample of wire made from an identical
material has three times the length and half the diameter of the first sample.
What is the Young modulus of the second sample of wire in terms of E?
A) 0.25E
B)E
C)6E
D)12E
A steel wire has a cross-sectional area 0.5 mm2
. The Young modulus of steel is 2.0 × 1011 Pa.
Assume the wire obeys Hooke’s law.
What load must be suspended from the wire to produce an extension which is 0.1% of the
original length?
A) 40N
B)50N
C)100N
D)200N
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robertoooo
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rezwan10
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rezwan10
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(Original post by rezwan10)
I know its D but how
I know its D but how
Question 2 is C
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robertoooo
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11lightsinthesky
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#6
(Original post by robertoooo)
It is D, E = (FL)/(A deltaL), L increases by x3, a is 4x smaller because diameter is 2x smaller, A is proportional to diameter^2
It is D, E = (FL)/(A deltaL), L increases by x3, a is 4x smaller because diameter is 2x smaller, A is proportional to diameter^2
And question 2 is C
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