Mechanical Biomedical
If the diameter of Al wire used for theses measurements is 4 mm and its length is 6 cm. Using graph
and given parameter of the material
Estimate (i) ultimate stress (ii) ultimate strain
(b) Young’ modulus for a wire is 4
Calculate the force needed to stretch the wire by 1 mm.
The length and diameter of the wire is 80 cm and 2 mm respectively. (Write all details)
If the diameter of the piston = 13.64 mm. Calculate the pressure (in Kilo Newton / m2 ) for the load mass
(including piston) 850 grams. (Write all details) (0.75)
Q. 6. (1.75)
Calculate the Reynolds number for the following parameters, when a steel ball is dropped in water
using viscometer apparatus. (Write all details)
Diameter of the steel ball = 30 mm
Distance travelled by the ball in the water tube = y = 1200 mm
Time taken by the ball to cover the distance = t= 1.16 second
Kinematic viscosity for water =
2
6
1.006 10 m
s
After terminal velocity is reached, the acceleration of a body falling through a fluid is:
(i) zero (ii) equal to g (iii) less than g (iv) greater than g
maximum (vi) None of the five (**g = acceleration due to gravity=9.8 m/s2 )
When a ball is dropped in vegetable oil using graduated cylinder:
Write the names of forces acting on the ball
Write the equation of motion of the system