HARD
11th Maharashtra Board
IMPORTANT
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Define stress and strain. What are their different types?

Important Questions on Mechanical Properties of Solids

HARD
11th Maharashtra Board
IMPORTANT
Physics>Chapter 6 - Mechanical Properties of Solids>Exercises>Q 4
What is Young’s modulus? Describe an experiment to find out Young’s modulus of material in the form of a long string wire.
HARD
11th Maharashtra Board
IMPORTANT
Physics>Chapter 6 - Mechanical Properties of Solids>Exercises>Q 4
Derive an expression for strain energy per unit volume of the material of a wire.
HARD
11th Maharashtra Board
IMPORTANT
Physics>Chapter 6 - Mechanical Properties of Solids>Exercises>Q 4
What is friction? Define coefficient of static friction and coefficient of kinetic friction. Give the necessary formula for each.
MEDIUM
11th Maharashtra Board
IMPORTANT
Physics>Chapter 6 - Mechanical Properties of Solids>Exercises>Q 4
State Hooke’s law. Draw a labeled graph of tensile stress against tensile strain for a metal wire up to the breaking point. In this graph show the region in which Hooke’s law is obeyed.
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 6 - Mechanical Properties of Solids>Exercises>Q 5
Calculate the coefficient of static friction for an object of mass 50kg placed on horizontal table pulled by attaching a spring balance. The force is increased gradually it is observed that the object just moves when spring balance shows 50N
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 6 - Mechanical Properties of Solids>Exercises>Q 5
A block of mass 37kg rests on a rough horizontal plane having coefficient of static friction 0.3 Find out the least force required to just move the block horizontally.
EASY
11th Maharashtra Board
IMPORTANT
Physics>Chapter 6 - Mechanical Properties of Solids>Exercises>Q 5
A body of mass 37kg rests on a rough horizontal surface. The minimum horizontal force required to just start the motion is 68.5N. In order to keep the body moving with constant velocity, a force of 43N is needed. What is the value of  (a) coefficient of static friction? And (b) coefficient of kinetic friction?
MEDIUM
11th Maharashtra Board
IMPORTANT
Physics>Chapter 6 - Mechanical Properties of Solids>Exercises>Q 5
A wire gets stretched by 4mm due to a certain load. If the same load is applied to a wire of same material with half the length and double the diameter of the first wire? What will be the change in its length?