A teen of mass m = 64 kg travels at a velocity vi = 1.55 m/s before jumping on a skateboard. After jumping on the board the teen has a velocity vf = 1.42 m/s. a)What is the mass of the skateboard in kilograms?  b)The teen soon loses his balance and falls backwards off the board at a velocity of 1.0 m/s. Assuming momentum is conserved in this process, what is the skateboard's new velocity in meters per second? [Note: this may not be a very good assumption, as there can be significant friction in the ball bearings of the skateboard]

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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 A teen of mass m = 64 kg travels at a velocity vi = 1.55 m/s before jumping on a skateboard. After jumping on the board the teen has a velocity vf = 1.42 m/s.

a)What is the mass of the skateboard in kilograms? 

b)The teen soon loses his balance and falls backwards off the board at a velocity of 1.0 m/s. Assuming momentum is conserved in this process, what is the skateboard's new velocity in meters per second? [Note: this may not be a very good assumption, as there can be significant friction in the ball bearings of the skateboard] 

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