Question

34. Ă rod placed against a smooth wall on a smooth floor is sliding downwards. If Va and Vb are the velocities of points A and B then

1)Va/Vb=x/y
2) Va^2+Vb^2=x^2+y^2
3)Va/Vb=y/x
4) Va = Vb
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Answer 1

⭐Actually welcome to the concept of the Relative velocity and kinematics

⭐Basically here we can see that, there is similar change in both the ends of the rods,

⭐Thus the time taken travel the distance by both the ends will be same,

⭐so we get as

❄ta = tb

⭐so from this we get as

Answer 2

Answer : Va/Vb = x/y

Explanation:length =x^2 + y^2

Differentiate it.since length is a constant,2xdx/dt +2ydy/dt =0 i.e.,xVa + yVb =0

i.e., Va/Vb = x/y