AIIMS Physics Mechanical Properties Of Solids Class 11 Questions

Initially spring is in natural length and both blocks are in rest condition. Then determine the maximum extension in spring. k = 20 N/M

A 2 m long rod of radius 1 cm which is fixed from one end is given a twist of 0.8 radians. The shear strain developed will be

Consider the spring A is compressed by x and spring B is compressed by (8.75 − x). The compressed force is,

A stress of 6×10⁶ Nm⁻² is required for breaking a material. The density ρ of the material is 3×10³ kgm⁻³. If the wire to break under its own weight, the length of the wire made of that material should be (take g = 10 ms⁻²)

Assertion: The stress-strain graphs are shown in the figure for two materials A and B are shown in figure. Young’s modulus of A is greater than that of B. Reason: The Young’s modulus for small strain is, Y = stress/strain = slope of linear portion of graph; and slope of A is less than slope that of B.

The length of a metal wire is $l_1$ when the tension in it is $T_1$ and is $l_2$ when the tension is $T_2$. The natural length of the wire is

A cylindrical wire is twisted with an angle θ, what is torsion produced in it?

Assertion : The size and shape of the rigid body remains unaffected under the effect of external forces. Reason : The distance between two particles remains constant in a rigid body.

Assertion : The size of a hydrogen balloon increases as it rises in air. Reason : The material of the balloon can be easily stretched.

The breaking stress of a wire depends upon

Assertion : Stress is the internal force per unit area of a body. Reason : Rubber is more elastic than steel.