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Physics 9 Chapter 7 - Properties of Matter - 21
1.
What is the force acting on unit area at the surface of a body called?
a) Strain
b) Young’s modulus
c) Elasticity
d) Stress
2.
What is the formula of stress?
a) Stress = Area / Force
b) Stress = Force / Area
c) Stress = Area x Force
d) Stress = Force x Area
3.
What is the SI unit of stress?
a) Newton per centimetre
b) Newton per square metre
c) Newton per decimetre
d) Newton per cubic metre
4.
What is the SI unit of stress?
a) Nm
3
b) Nm
2
c) Nm
-3
d) Nm
-2
5.
When stress acts on a body, which of the following of a body may change?
a) Shape
b) Volume
c) Length
d) All of these
6.
What is the comparison of a change in length with the original length called?
a) Young’s modulus
b) Strain
c) Elasticity
d) Stress
7.
What is the comparison of a change in volume with the original volume called?
a) Elasticity
b) Stress
c) Strain
d) Young’s modulus
8.
What is the comparison of a change in shape with the original shape called?
a) Stress
b) Young’s modulus
c) Elasticity
d) Strain
9.
What is the strain called if stress produces a change in the length of an object?
a) Tactile strain
b) Modulus strain
c) Sidle strain
d) Tensile strain
10.
What is the unit of strain?
a) Nm
-3
b) Nm
2
c) No unit
d) Pascal
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