A model train with a mass of #6 kg# is moving along a track at #8 (cm)/s#. If the curvature of the track changes from a radius of #3 cm# to #16 cm#, by how much must the centripetal force applied by the tracks change?

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Answer 1 · 2017-10-09T07:55:23

#\DeltaF=1.04N#

#F_\circ=(mv^2)/r#

#\DeltaF = F_1-F_2=(mv^2)/r_1-(mv^2)/r_2=(6*0.08^2)/0.03-(6*0.08^2)/0.16=1.04N#