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Poffset-next&assign; ID=83957213 Secure https://session.masteringphysics.com Assignment5-circular moton stuff PSS 7.1: The Round Trip a previous 1 3of8 Inext radial, tangential C,D PSS 7.1: The Round Trip My Answers Give Up Learning Goal: Correct To understand how to use Problem-Solving Strategy 7.1 for probiems involving circular motion. A cyclist competes in a one-lap race around a fRat, circular course of radius r. Starting from rest and speeding up at a consiain a ime At. The mass accumulated to construct cyclist covers the entire course in a time . The mass of the bicycle (including the rider) is m. What is the magnitude of the net force Foet acting on the bicyclo as it crosses the finish line? Solve Use the information and the insights that you have accumulated to construct the necessary mathematical Part E Find Fnet the magnitude of the net force acting on the cyclist at the finish line. Express the net force in terms of r, , m, and Figure 1 2 Hints X-10 Start/Finish Top view Foet Submit My Answers Give Up

Explanation / Answer

d = v0 t + a t^2 /2

2 pi r = 0 + a (delta(t))^2 /2

a = 4 pi r / (delta(t))^2 ...this is tangential acc.

v = v0 + a t

v = 0 + 4 pi r / delta(t)

radial acc., a_r = v^2 / r = 16 pi^2 r / (delta(t))^2

Fnet = m a_net

= m sqrt(a_t^2 +a_r^2)

= m sqrt[4 pi r / (delta(t))^2)^2 + (16 pi^2 r / (delta(t))^2 ) ]

= m 4 pi r / (delta(t))^2 sqrt[1 + 4pi]

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