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Showing results for tags 'brakes'.
Found 3 results
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Name: Do Anti-lock Brakes use Static or Kinetic Friction? by Billy Category: Dynamics Date Added: 2016-06-30 Submitter: Flipping Physics Billy analyzes ABS brakes to show the difference between Rolling without Slipping and Rolling with Slipping. He also answers the question in the title of the video, but why would I write that in the description? Want Lecture Notes? This is an AP Physics 1 Topic. Content Times: 0:17 ABS Brakes 0:40 Demonstrating Rolling without Slipping and Rolling with Slipping 1:36 How ABS Brakes work 2:18 Analyzing a car tire 3:34 The calculations Next Video: Everybody Brought Mass to the Party! Multilingual? Please help translate Flipping Physics videos! Previous Video: Does the Book Move? An Introductory Friction Problem Please support me on Patreon! Do Anti-lock Brakes use Static or Kinetic Friction? by Billy
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Name: Introduction to Acceleration with Prius Brake Slamming Example Problem Category: Kinematics Date Added: 21 May 2014 - 08:52 AM Submitter: Flipping Physics Short Description: None Provided This is an introduction to the concept of acceleration. There is also an example problem showing applying the brakes while driving a car in order to avoid hitting a basketball. Also included are common mistakes students make while solving a simple problem like this. It is important to see what those mistakes are because it helps students avoid them in the future. Content Times: 0:19 The Equation for Acceleration 1:06 The Dimensions for Acceleration 2:18 Acceleration has both Magnitude and Direction 3:00 Reading the Problem 3:15 Video of the Problem 4:29 Translating the Problem to Physics 5:03 Starting to solve the Problem (with mistakes) 5:37 Explaining two mistakes 7:34 Explaining another mistake 10:00 Outtakes (including a basketball dribbling montage) View Video
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Bob is barreling down the thruway in his truck at 40 m/s when a crash occurs in front of it. The driver wants to stop in the shortest distance possible. He slams on the brakes. Before the invention and implementation of the Anti-lock brake system, or ABS, the truck's tires would have locked up and the truck would have slid into the crash. Why? When brakes cause tires to lock up, the type of friction between the tires and road changes from static friction to kinetic friction. This decreases the total force of friction between the surfaces. Because of the decrease in force opposing the truck's motion, the truck cannot stop in a short distance. How does the ABS prevent this? The Anti-lock brake system prevents the tires from locking up. Therefore, the type of friction between the tires and the road is always static, the strongest type of friction. The implementation of ABS into modern cars and trucks has prevented crashes from panicked drivers, such as Bob, by allowing them to come to a complete stop in shorter distances than before possible, even better than experienced drivers using advanced braking techniques without ABS.
