Advertisements
Advertisements
Question
A spring balance shows wrong readings after using it for a long time. Why?
Advertisements
Solution
When a spring balance has been used for a long time, it develops elastic fatigue, the spring of such a balance takes a longer time to recover its original configuration and therefore it does not give a correct measurement.
APPEARS IN
RELATED QUESTIONS
Consider two wires X and Y. The radius of wire X is 3 times the radius of Y. If they are stretched by the same load then the stress on Y is ___________.
If a wire is stretched to double of its original length, then the strain in the wire is __________.
Two wires are made of the same material and have the same volume. The area of cross-sections of the first and the second wires are A and 2A respectively. If the length of the first wire is increased by ∆l on applying a force F, how much force is needed to stretch the second wire by the same amount?
Define Poisson’s ratio.
Which one of these is more elastic, steel or rubber? Why?
What is the effect of temperature on elasticity?
Write down the expression for the elastic potential energy of a stretched wire.
Explain the different types of modulus of elasticity.
Derive an expression for the elastic energy stored per unit volume of a wire.
We use the straw to suck soft drinks, why?
