Question

B lock A has a velocity of $0.6m/s$ to the right. The velocity of block $B$ in $m/s$ is

• A. $0.6$
• B. $1.8$
• C. $1.2$
• D. $2$

Answer 1

The correct option is B $1.8$

Given, $V_A=0.6m/s$ [to the right ]

This can be solved with help of constraints equation, As we can see, a string is attached with block A, and three string is folded with pulley which is attached with B.

e.g., $x_B=3x_A$

Now, differentiate with respect to $x$

$V_B=3V_A$

$V_B=0.6\times 3=1.8$ m/s [ downward ]