A 55 kg skateboarder (with the board) wants to just make it to the upper edge of a "half-pipe" with a radius of 3.0 m, as shown in the figure. The thickness of the pipe can be assumed to be negligible. 3.0 m What speed v, does he need at the bottom if he is to coast all the way up (1) if we treat the skateboarder with the board as a point particle, with the entire mass nearly in contact with the half-pipe? (ii) if the mass of the skateboarder with the board was in a deep crouch and can be thought of as concentrated 0.75 m from the half-pipe, and assume he remains in that position all the way up to reach the upper edge?

A 55 kg skateboarder (with the board) wants to just make it to the upper edge of a "half-pipe" with a radius of 3.0 m, as shown in the figure. The thickness of the pipe can be assumed to be negligible. 3.0 m What speed v, does he need at the bottom if he is to coast all the way up (1) if we treat the skateboarder with the board as a point particle, with the entire mass nearly in contact with the half-pipe? (ii) if the mass of the skateboarder with the board was in a deep crouch and can be thought of as concentrated 0.75 m from the half-pipe, and assume he remains in that position all the way up to reach the upper edge?

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.

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A 55 kg skateboarder (with the board) wants to just make it to the upper edge
of a "half-pipe" with a radius of 3.0 m, as shown in the figure. The thickness of
the pipe can be assumed to be negligible.
2
3.0 m
What speed v, does he need at the bottom if he is to coast all the way up
(1) if we treat the skateboarder with the board as a point particle, with the
entire mass nearly in contact with the half-pipe?
(ii) if the mass of the skateboarder with the board was in a deep crouch and
can be thought of as concentrated 0.75 m from the half-pipe, and assume
he remains in that position all the way up to reach the upper edge?

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