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. A biker is accelerating when she applies the brakes and then speeds up again. The net horizontal force is shown in the graph. Assume she moves in a 20 straight line and the mass of the biker and bike is 80 kg. The biker was moving at 8 m/s at t = 0. How fast is she moving at t = 20 s? 8 12 time (sec) 16 20 net x-Force (Newtons) 20

. A biker is accelerating when she applies the brakes and then speeds up again. The net horizontal force is shown in the graph. Assume she moves in a 20 straight line and the mass of the biker and bike is 80 kg. The biker was moving at 8 m/s at t = 0. How fast is she moving at t = 20 s? 8 12 time (sec) 16 20 net x-Force (Newtons) 20

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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**Problem Statement:** 3. A biker is accelerating when she applies the brakes and then speeds up again. The net horizontal force is shown in the graph. Assume she moves in a straight line and the mass of the biker and bike is 80 kg. The biker was moving at 8 m/s at \( t = 0 \). How fast is she moving at \( t = 20 \, \text{s} \)? **Graph Description:** The graph is a plot of net force in the \(x\)-direction (in Newtons) against time (in seconds). - From \( t = 0 \) to \( t = 5 \, \text{s} \), the force is constant at \( 30 \, \text{N} \). - From \( t = 5 \, \text{s} \) to \( t = 10 \, \text{s} \), the force drops to \(-30 \, \text{N} \). - From \( t = 10 \, \text{s} \) to \( t = 15 \, \text{s} \), the force linearly increases back to \( 0 \, \text{N} \). - From \( t = 15 \, \text{s} \) to \( t = 20 \, \text{s} \), the force increases further to \( 20 \, \text{N} \).
Transcribed Image Text:**Problem Statement:** 3. A biker is accelerating when she applies the brakes and then speeds up again. The net horizontal force is shown in the graph. Assume she moves in a straight line and the mass of the biker and bike is 80 kg. The biker was moving at 8 m/s at \( t = 0 \). How fast is she moving at \( t = 20 \, \text{s} \)? **Graph Description:** The graph is a plot of net force in the \(x\)-direction (in Newtons) against time (in seconds). - From \( t = 0 \) to \( t = 5 \, \text{s} \), the force is constant at \( 30 \, \text{N} \). - From \( t = 5 \, \text{s} \) to \( t = 10 \, \text{s} \), the force drops to \(-30 \, \text{N} \). - From \( t = 10 \, \text{s} \) to \( t = 15 \, \text{s} \), the force linearly increases back to \( 0 \, \text{N} \). - From \( t = 15 \, \text{s} \) to \( t = 20 \, \text{s} \), the force increases further to \( 20 \, \text{N} \).
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