Physics
posted by Alex .
In a fairground ride a child of mass 37 kg stands against the inside surface of a circular cylinder of radius 3.9m that rotates around its vertical axis of symmetry. The cylinder has an angular speed of 1.3 rad/s and an angular acceleration of 0.12 rad s^2. What is the radial inward force on the child.

M*R*w^2
w is the angular speed
M is the mass
R is the radius
The angular acceleration doesn't matter in the radial direction.