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x Paor GPa
x Pa E
m
m m
l
l l
x Paor MPa m
x N
D
F
D
F
A
F
o
f o
9
6
6 2
3
2 2
⊥ ⊥ ⊥
m
N m
N
k
F
F kx x 1. 25
- A spring with a spring constant of 4 N/m has a force of 40 N stretching it.
How much does the spring stretch?
SOLUTION:
- A bar is 0.5m long and is stretched to 0.51m with a force of 50 KN. The bar
is 0.02m in diameter. Determine the tensile stress, tensile strain and the
modulus of elasticity.
SOLUTION:
F A x Pa m x m x N
G x Pa x Paor GPa
m
x m
h
x
TAN
9 4 5
9 9
4
( 1. 59 10 )( 0. 1 )( 20 10 ) 3. 18 10
( 0. 02 )( 79. 3 10 ) 1. 59 10 1. 58
- 02
- 1
20 10
= = =
= = =
= = =
−
−
x Pa x Paor GPa V
pV B
o ( 7 10 )( 0. 04 ) 0. 28 10 0. 28
9 9 = =
- The steel base plate of the building column experiences shear forces as a
result of an earthquake. The steel base plate is 0.25m^2 and 0.1m thick. The
modulus of rigidity of steel is 79.3 GPa. How large a force must be exerted
on each of its edges if the deformed displacement is 20x10-^4 m?
SOLUTION:
- A steel ball is immersed in a liquid so that the hydrostatic pressure is 7 GPa.
This pressure causes a contraction in the diameter of the steel ball. If the ratio
of its original volume to the change in the volume is 0.04, determine the bulk
modulus.
SOLUTION:
