0

Guest

Courses New

Block B moves to the right with a constant velocity v(not). The velocity of body A relative to B is: (A) v(not)/2 toward s right (B) V(not)/2 towards left (C) 3V(not)/2 towards left (D) 3V(not)/2 towards right.

Block B moves to the right with a constant velocity v(not). The velocity of body A relative to B is: (A) v(not)/2 toward s right (B) V(not)/2 towards left (C) 3V(not)/2 towards left (D) 3V(not)/2 towards right.

Question Image
Grade:12th pass

2 Answers

prayansh
13 Points
6 years ago
Block B moves to the right with a constant velocity v(not). The velocity of body A relative to B is: (A) v(not)/2 toward s right (B) V(not)/2 towards left (C) 3V(not)/2 towards left (D) 3V(not)/2 towards right.
Venkat
273 Points
5 years ago
Let xE= length of bottom rope length, XD= middle  rope length, Xc=top rope length, X is fixed at bottom rope starting point, XA= Distance upto block A (POSITIVE TO THE left) , XB= distance upto mass B (positive to the right).
so  LE=XB  
 
LD=XB+XA       (1)
 
LC=XB+XA   (2)
 
L=LE+LD+LC = 3XB+2XA   (3)
 
L= CONSTANT ,
 
diff (3) → 0 =3VB+2VA→ VA = -3VB/2
 
VAB=VB-(-VA)  (note the comment above for VA is negative)
 
VAB = VB-(-(-3VB/2))
VAB =(1-3/2) VB = -0.5 VB
VAB =-0.5 V0
 
For velocity, right is taken as positive. Since answer is negative the block moves towards left.
 
Answer option (B)
 

Think You Can Provide A Better Answer ?

Other Related Questions on Mechanics

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More