A disk is initially at rest. A penny is placed on it at a distance of 1.8 m from the rotation axis. At time
t = 0 s,
the disk begins to rotate with a constant angular acceleration of
1.3 rad/s2
around a fixed, vertical axis through its center and perpendicular to its plane. Find the magnitude of the net acceleration of the coin at
t = 1.2 s

Question

A disk is initially at rest. A penny is placed on it at a distance of 1.8 m from the rotation axis. At time
t = 0 s,
the disk begins to rotate with a constant angular acceleration of
1.3 rad/s2
around a fixed, vertical axis through its center and perpendicular to its plane. Find the magnitude of the net acceleration of the coin at
t = 1.2 s

irishboy123 · Answer

what's the problem?

michele_laino · Answer

hint:
here we have to write the equation of the motion of the coin

anonymous · Answer

delta velocity per delta time

michele_laino · Answer

no, it is more complex, since we have to consider the force of Coriolis.
You have to understand how many forces are acting on your coin, when the disk is moving

anonymous · Answer

Do you need both the centripetal and tangential acceleration to find the net acceleration here?

michele_laino · Answer

here we have two forces acting on your coin, namely the centripetal force and the force of Coriolis. Now you have to write a differential equation, which model the motion of your coin

irishboy123 · Answer

yes, you just need to calculate the magnitude of the net acceleration which is made up of radial and tangential acceleration vectors -- assumes the coin does not slip.....but you don't have a friction coefficient so that seems an obvious assumption.