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# in the image, the velocity of the lift is 2 m/s upwards while the string is winding on the motor shaft at 2m/s and block a is moving with a velocity of 2m/s downwards.then find out velcoity of vlock B.

G Narayana Raju
51 Points
9 years ago

by use constraints we can solve the sum,

as vb=va+(velocity of winding)

but given that the whole system is moving upward at 2m/s.

there for vb=4+1

=5m/s.

Harsh jain
16 Points
4 years ago
(V-4)/2= 2 Velocity =8m/s upward by the use of pully Travels average of the two points constrained motion equation
Shwetanki
13 Points
2 years ago
V= Val + Vl = 2-2 = 0
Use point method
-V+2+2+0 =-2 (as length of string decreasing by 2m/s rate)
V= 6m/s