Police investigator observes a skid marks 25m long left by a 1500kg car.The car skidded to stop on a concrete highway having a coefficient ofkinetic friction with the tires of 0.80. Estimate the car's speed at thebeginning of the skid?Your answerA 50-kg skater travelling at 5m/s overtakes a 60-kg skater travelling at2.5m/s in the same direction and collides with him. If the two remains incontact after the collision, how much kinetic energy is lost?Your answer

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Police investigator observes a skid marks 25m long left by a 1500kg car. The car skidded to stop on a concrete highway having a coefficient of kinetic friction with the tires of 0.80. Estimate the car's speed at the beginning of the skid?

Police investigator observes a skid marks 25m long left by a 1500kg car. The car skidded to stop on a concrete highway having a coefficient of kinetic friction with the tires of 0.80. Estimate the car's speed at the beginning of the skid?

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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Concept explainers

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.

Question

Police investigator observes a skid marks 25m long left by a 1500kg car.
The car skidded to stop on a concrete highway having a coefficient of
kinetic friction with the tires of 0.80. Estimate the car's speed at the
beginning of the skid?
Your answer
A 50-kg skater travelling at 5m/s overtakes a 60-kg skater travelling at
2.5m/s in the same direction and collides with him. If the two remains in
contact after the collision, how much kinetic energy is lost?
Your answer

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