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Worksheetsforce on solids
Total questions: 27
Worksheet time: 24mins
Which of the lists below is NOT an example of elastic bodies?
Rubber band
Balloon
Metal spring
Steel wire
Which of the statement below best describe elasticity?
Returns to its original shape after the distorting force is removed.
Won't go back to its original shape after the force is removed
Nothing happen even when force is applied
Retain its shape once its is distorted
Hooke's Law states that (a)
Which equation represent Hooke's Law?
F = m e
Weight = Mass x gravitational acceleration
Extension = New length - original length
F = k e
What happen when elastic point is achieved?
A spring will not go back to its original length and left with permanent extension
A spring will not go back to its original length and it will break
A spring will go back to its original length and no permanent extension
A spring will go back to its original length and smaller in size
Which point represent the elastic limit?
A
B
C
D
Which point shows that the material is obeying Hooke's Law?
A
C
D
F
Which statement correctly define plastic behaviour?
When force is applied and exceeds it elastic limit and the object stays deformed after the force is removed
the materials will go back to its original shape even after the force is removed
The materials exceeds its elastic limit but the shape will go back to its original shape once the force is removed
The object obey the Hooke's Law and stays deformed when the force is removed
Elastic stiffness is the rigidity of the object, hence it [allows / resists] deformation when force is applied
(a)
Stiffness is the ratio of force and the (a)
Which of the object below has high stiffness?
Aluminium
Rubber
Steel
Copper
What is the extension of the spring?
15 cm
25 cm
10 cm
40 cm
Calculate the spring constant.
15680 N/m
156.8 N/m
15.68 N/m
16 N/m
The diagram shows the Force-Extension graph of a spring. What is the spring constant?
5 N/m
0.1 N/m
1 N/m
10 N/m
Calculate the spring constant.
24.5 N/m
0.0816 N/m
2450 N/m
2401 N/m
The graph shows the load-extension graph of
plastic
rubber
steel
spring
If a spring has a spring constant of 270 N/m and it is stretched 2.4 m, what is the force of the spring?
112.5 N
648 N
272.4 N
650 N
A spring with a spring constant of 400 N/m has a mass hung on it so that it stretches 8 cm. Calculate how much mass the spring is supporting.
32 kg
3.3 kg
3200 kg
5.3 kg
[Stress / Strain] is the force per cross sectional area of that material can hold.
(a)
[ Stress / Strain ] is the displacement of material that resulted from stress
(a)
(a) is the property of that material that can tells us how easily it can be stretch or deform
A stiff material has a ______ Young's modulus and changes its shape only slightly under elastic loads
high
low
zero
maximum
A flexible material has a _____ Young's modulus and changes its shape considerably
high
low
zero
mininum
a steel bar is stressed to 300 MPa. the Young's Modulus is 205 GPa. The bar is 80 mm diameter and 240 mm long. Find the strain.
1 463
1.463
1.463 ×103
1.463 ×10−3
A large crane has a steel lifting cable of radius 18 mm. The steel used has a Young Modulus of 200 GPa. When the crane is used to lift 20 kN, the unstretched cable length is 25.0 m.
19.6 Pa
19,648 Pa
1.96 × 103 Pa
1.96 × 107 Pa
A stress of 2.0915 × 108 Pa causes a 3.5 m steel wire to stretch by 0.9 mm. Calculate the Young's Modulus of the wire.
8.134 × 1011 Pa
8.134 × 108 Pa
5.976 × 107 Pa
2.324 × 1011 Pa
A stress of 4.39 x109 Pa causes a 4 m copper wire to stretch by 15 cm. Which of the following correctly determine the strain and the Young’s Modulus of copper.
A
B
C
D
