Momentum and CollisionHard
Question
A steel wire 1.5 m long and of radius 1 mm is attached with a load 3 kg at one end the other end of the wire is fixed it is whirled in a vertical circle with a frequency 2Hz. Find the elongation of the wire when the weight is at the lowest position - (Y = 2 × 1011 N/m2 and g = 10 m/s2)
Options
A.1.77 × 10-3 m
B.7.17 × 10-3 m
C.3.17 × 10-7 m
D.3.37 × 10-7 m
Solution
Tension in wire at lowest position
T = mg + mω2r
So elongation
T = mg + mω2r
So elongation
Create a free account to view solution
View Solution FreeMore Momentum and Collision Questions
A uniform rod AB of mass M is attached to a hinge at one end A, and released from rest from the horizontal position. The...A disk A of radius r moving on perfectly smooth surface at a speed v undergoes an elastic collision with an identical st...A hammer of mass M strikes a nail of mass m with velocity of v ms-1 and drives it ′a′ metre into fixed block...A ball of mass 1 kg drops velocity on to the floor with a speed of 25 m/s. It rebounds with an initial velocity of 10 m/...A 2m long rod of radius 1 cm which is fixed from one end is given a twist of 0.8 radians. The shear strain developed wil...