- #1

Like Tony Stark

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- Homework Statement
- The picture shows a mass ##A## falling with velocity ##400 cm/s## and acceleration ##16 cm/s^2##.

The mass ##B## is connected to ##A## as depicted in the picture.

- Relevant Equations
- ##V_{B/A}=V_B - V_A

The thing is that my professor said that if the velocity of ##A## is ##400 cm/s##, the velocity of ##B## is ##200 cm/s## because "##B## is connected to two parts of the rope and ##A## is conected just to one part", and he also said that that ##200 cm/s## is the velocity of ##B## with respect to ##A##.

And I didn't understand any of them. Why is the velocity of ##B## half the velocity of ##A##? (I don't understand what the "two parts of the rope" have to do with the velocity)

And why is that velocity the velocity of ##B## with respect to ##A##?

And I didn't understand any of them. Why is the velocity of ##B## half the velocity of ##A##? (I don't understand what the "two parts of the rope" have to do with the velocity)

And why is that velocity the velocity of ##B## with respect to ##A##?