Recent content by tachyontensor

You have the right equation. Just apply conservation of momentum comparing the initial conditions, which are known, to the final conditions. The book's final velocity and mass are known, and so is the man's mass, so this should allow you to find his velocity. (the only unknown in the equation)

Final velocity (linear and angular) is zero because the problem says the merry-go-round stops. Try thinking of this in terms of linear kinematics, making the appropriate substitutions.

Initially, the textbook also has zero velocity.

How are torques computed about an axis when the axis (and the attached body) are both accelerating at the same rate? For example, if a car is in free fall with the doors open (with the rear end of the car pointing towards the ground) will the doors shut themselves due to torque? Or, is the...

I'm such an idiot. That's so obvious too. Thanks for all your help, I really should have noticed that earlier.

Thanks for your help, but I still don't understand why the centripetal force would be drawn away from the nucleus. From what I understood, both authors were always referring to inertial reference frames, which is why I found the presence of the word 'centrifugal' to be odd for what looked like a...

In a few chemistry books/resources I've seen the Bohr model of the atom is developed equating the electrostatic force to a centripetal force. Yet these sources also depict the centripetal force as being directed outward, away from the nucleus. (a single proton for the H atom) One even called it...