Alan, Dabir and Harum test three zip wires to find which one is the fastest. Dabir oils his trolley before he makes his trip but the others do not. Alan swings
about on his journey and travels 60 metres in 1 minute, Dabir lies back so his
body is vertical and travels 90 metres in 1 minute, Harum makes a star shape
and ravels 120 metres in 1 minute.
a) What force may be affected by oiling one trolley and not the other?
b) What force may be affected by the positions of Dabir and Harum’s bodies?
c) 'Show your working to calculate the speeds in km/hr of:
(i) Alan
(ii)Dabir
(iii)Harum