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Question

The two ends A and B of a uniform rod of length l=1 m are moving with velocities VA and VB as shown. The velocity VB(m/s) is

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Solution

15.00
Given that,
Velocity of A = 20 m/s
Velocity of B = VB m/s
According to diagram
Velocity of A along Xaxis along AB is
VAX=VAcos53
VAX=20cos53
VAX=20×35
VAX=12 m/s(1)
Now, velocity of B along xaxis along AB is
VBX=VEcos37
VBX=VE×45(2)
Now, from equation (1) and (2)
12=VE×45
VE=604
VE = 15
Hence, the velocity VE is 15 m/s


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