Galejen
20 ships, each carrying 2 persons
2r = 11.5 m diameter
h = 1.25 m "waves"
T = 8.6 s to complete a full circle
Questions for discussions or calculations
If you ride with a small child, do you sit to the right or to the left in the boat?
How large is the centripetal acceleration?
How much does the centripetal acceleration differ between the inner and outer seat in the boat?
You look at the long ponytail of the rider in front of you. Describe the direction of the ponytail
What is the maximum acceleration due to the up and down motion?
How does this affect the ponytail in front of you?
Comments to the questions above
1: Place the child closer to the centre, i.e. you sit to the left
2: r*(2 pi/T)^2 =3 m/s =a_c
3: Delta-a_c = (delta-r/r) * a_c = Ã0.1 a_c
4: sin(theta)= 3.1/g. The angle is around 18 .
5: The centripetal acceleration is around 5m/s^2
6: This changes the ponytail angle to around 40 .
Ann-Marie.Pendrill@fysik.lu.se
, May 2010