A 40kg boy whose legs are `4cm^2` in area 50 cm long falls through a height of 2 m without breaking his leg bones. if the bones can stand on stress of 1.0 `times 10^8 Nm^2` calculate the young's modulus for the material of the bone

A 45 kg boy whose leg bones are 5 cm^(2) in area and 50 cm long falls through a height of 2m with out breaking his leg bones. If the bones can stand a stress of 0.9 xx 10^(8) Nm^(-2) , Calculate the Young's modulus for the material of the bone. Use , g=10 ms^(-2)

The graph shows the extension of a wire of length 1m suspended from the top of a roof at one end and with a load W connected to the other end. If the cross sectional area of the wire is 1mm^(2) , then the young's modulus of the material of the wire is (a). 2xx10^(11)Nm^(-2) (b). 2xx10^(10)Nm^(-2) (c). (1)/(2)xx10^(11)Nm^(-2) (d). none of these

The bulk modulus of quartz is 2.70xx 10^(10) Nm^(-2) . Calculate its Young's modulus if the Poisson's ratio of quartz is 0.154.

Calculate the force required to incrase the length of wire of cross-sectional area 10^(-6) m^(2) by 50% if the Young's modulus of the material of the wire is 90 xx 10^(9) Pa .

A ball whose density is 0.4 xx 10^3 kg//m^3 falls into water from a height of 9 cm. To what depth does the ball sink ?

Find the maximum energy per unit volume that can be stored in a metal wire when stretched, if its breaking stress is 1.3 xx 10^(8) Nm^(-2) and Young's modulus of the material is 2.2 xx 10^(11) Nm^(-2) .

A 94.2 cm long sitar string of 1mm diameter is tuned by stretching it 1.0 cm. Calculate (i) the tension (ii) the work done in stretching the wire (Young's modulus of the material of the wire is 6 xx 10^(10) N//m^(2) ).

(a) A wire 4 m long and 0.3 mm, calculate the potential energy stored in the wire. Young's modulus for the material of wire is 2.0xx10^(11) N//m^(2) .

Find the work done in stretching a wire Im long and area of cross section 0.03 cm under a load of 100 N if Young.s modulus of the material of the wire is 2 xx 10^(11)N//m^(2)

Clamped at the middle a metal rod of length 1m and density 7.5 xx 10^(3)kg//m^3 gives dust heaps at intervals of 8cm. Calculate the Young's modulus of the material of the rod. Velocity of sound in the gas used in 400m/s.