A body resting on a horizontal surface is given an initial velocity V so that it slides on the
surface for some distance before coming to a stop. Table 1 shows the distance d moved by the body of various values of V.

Given that #V^2# = 20#mu#d where #mu# is a constant for the surface, plot an appropriate graph and use it to determine #mu#.

Answer:

#V^2 =mud# but,

#20mu#=gradient

=#((10-4.4)times10^-1)/((17-7.5)times10^-2)#
=5.89

#mu=5.89/20#=0.2945m/s

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