NEET Test Series from KOTA - 10 Papers In MS WORD
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Mechanical Properties of Solids
140929
Writing on black board with a piece of chalk is possible by the property of
1 Adhesive force
2 Cohesive force
3 Surface tension
4 Viscosity
Explanation:
A When we write with chalk on the black board, its rough surface rubs off some chalk particles which stick to the black board. This happens due to the frication between the surface of the black board and the chalk i.e. adhesive force.
MP PET-2008
Mechanical Properties of Solids
140935
A body subjected to strain several times will not obey Hooke's law due to
1 yield point
2 permanent state
3 elastic fatigue
4 breaking stress
Explanation:
D When a body subjected to strain several times then its length increase suddenly and material of body flows like a viscous fluid and its gain yield point after that it does not obey Hook's law.
140929
Writing on black board with a piece of chalk is possible by the property of
1 Adhesive force
2 Cohesive force
3 Surface tension
4 Viscosity
Explanation:
A When we write with chalk on the black board, its rough surface rubs off some chalk particles which stick to the black board. This happens due to the frication between the surface of the black board and the chalk i.e. adhesive force.
MP PET-2008
Mechanical Properties of Solids
140935
A body subjected to strain several times will not obey Hooke's law due to
1 yield point
2 permanent state
3 elastic fatigue
4 breaking stress
Explanation:
D When a body subjected to strain several times then its length increase suddenly and material of body flows like a viscous fluid and its gain yield point after that it does not obey Hook's law.