Which forces keep the bottle moving
round and round?

Centripetal force

Explanation:

The force that keeps a bottle moving round and round in circular motion is centripetal force.

Centripetal force is an inward directed force that keeps a body in circular motion. This force keeps a body moving along a circular path.

To find the force, we use the expression below;

     F =

F is the centripetal force

m is the mass of the body

v is the velocity

r is the radius

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000