A ball with a mass of 10 kg is hanging from a long string that is tied to the ceiling of a train car traveling eastward on horizontal tracks. An observer inside the train car sees the ball hang motionless. If the train stops from 60 km/h velocity within 5 s, draw a clearly labeled free-body diagram for the ball and compute for the tensional force on the string (assumes that the string didn’t break).

A ball with a mass of 10 kg is hanging from a long string that is tied to the ceiling of a train car traveling eastward on horizontal tracks. An observer inside the train car sees the ball hang motionless. If the train stops from 60 km/h velocity within 5 s, draw a clearly labeled free-body diagram for the ball and compute for the tensional force on the string (assumes that the string didn’t break).

Classical Dynamics of Particles and Systems

5th Edition

ISBN:9780534408961

Author:Stephen T. Thornton, Jerry B. Marion

Publisher:Stephen T. Thornton, Jerry B. Marion

Chapter2: Newtonian Mechanics-single Particle

Section: Chapter Questions

Problem 2.51P: Let us make the (unrealistic) assumption that a boat of mass m gliding with initial velocity v0 in...

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

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