CBSE Class 12-science Answered
An aluminum bar 100 cm in length 2cm in width 0.5cm in thickness is supported on two horizontal knife edges 60 cm of a part.if the middle of the beam rise by point 6cm when two equal rates of 1 kg are attached at two end. calculate young modulus of aluminum
Asked by Mdsimabc | 23 Aug, 2019, 02:44: PM
Expert Answer
Youngs Modulus Y is obtained from the formula given below using the elevation measured in uniform bending of beam.
where M is mass of load applied, M = 1 kg
g is acceleration due to gravity, g = 9.8 m/s2
a is the distance of load applied point from knife edge, a = 20 cm = 20×10-2 m
l is the distance between knife edge, l = 60 cm = 60×10-2 m
s is the elevation (rise of the middle point of beam), s = 6 cm = 6×10-2 m
b is breadth of the beam , b = 2 cm = 2×10-2 m
d is thickness of beam, d = 0.5 cm = 5×10-3 m
By substituting all the values in the formula (1), we get Y ≈7 ×109 N/m2 = 7 GPa
( Youngs modulus of Aluminium ~70GPa, but by solving this question we get only 7 GPa.
I suspect the elevation (rise of the mid point of beam) value 6 cm is not realistic,
6 mm may be reasonable. if we consider this elevation as 6 mm, then we get Youngs modulus 70 GPa )
Answered by Thiyagarajan K | 23 Aug, 2019, 09:32: PM
Concept Videos
-
Electric Charge - Part 1
This video describes the concept of charge, conductors and insulators, and ... -
Gold Leaf Electroscope - Part 1
This video explains the basic properties of electric charges. -
Coulom's Law of Electric Force - Part 1 ...
This video describes Coulomb's law to calculate the force between any two p... -
All about electric fields
Define electric field in terms of Coulomb's force. Apply superposition prin... -
Electric Field Lines
This video explains the representation of electric field due to a single ch...
CBSE 12-science - Physics
Asked by sahoobanita89 | 30 Apr, 2024, 05:10: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by divakar.9124 | 27 Apr, 2024, 10:42: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by panneer1766 | 24 Apr, 2024, 01:52: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by artabandhusahu85 | 24 Apr, 2024, 12:07: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by niharvijayvargiya5 | 23 Apr, 2024, 06:40: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by kulhariabhijeet | 21 Apr, 2024, 02:39: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by mohapatraswetalina88 | 21 Apr, 2024, 12:18: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by aishaisha091098 | 19 Apr, 2024, 04:54: PM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by dasrituparna1999 | 13 Apr, 2024, 06:56: AM
ANSWERED BY EXPERT
