Physics

Problem

200\,\text{kg}

motorcycle–rider system is examined in four situations. I. The motorcycle is at rest at a stoplight. II. The motorcycle travels in a straight line at a constant

15\,\text{m/s}

. III. The motorcycle speeds up from

15\,\text{m/s}

25\,\text{m/s}

2\,\text{s}

on a straight road. IV. The motorcycle rounds a level circular turn of radius

30\,\text{m}

at a constant

15\,\text{m/s}

. Rank the magnitude of the net force on the system from greatest to least (use “=” to denote ties). a) III > IV > II = I b) IV = III > II > I c) IV > III > II = I d) III > II > IV > I

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