21. A ball having mass m is fas- tened at the end of a flagpole т that is connected to the side of a tall building at point P as shown in Figure P11.21. The length of the flagpole is l, and it makes an angle 0 with the x axis. The ball becomes loose [P and starts to fall with accelera- tion -gj. (a) Determine the angular momentum of the ball about point P as a function of time. (b) For what physical reason does the angular momentum change? (c) What is the rate of change of the angular momen- tum of the ball about point P? Figure P11.21

21. A ball having mass m is fas- tened at the end of a flagpole т that is connected to the side of a tall building at point P as shown in Figure P11.21. The length of the flagpole is l, and it makes an angle 0 with the x axis. The ball becomes loose [P and starts to fall with accelera- tion -gj. (a) Determine the angular momentum of the ball about point P as a function of time. (b) For what physical reason does the angular momentum change? (c) What is the rate of change of the angular momen- tum of the ball about point P? Figure P11.21

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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Question

21. A ball having mass m is fas-
tened at the end of a flagpole
т
that is connected to the side
of a tall building at point P as
shown in Figure P11.21. The
length of the flagpole is l, and
it makes an angle 0 with the x
axis. The ball becomes loose
[P
and starts to fall with accelera-
tion -gj. (a) Determine the
angular momentum of the
ball about point P as a function of time. (b) For what
physical reason does the angular momentum change?
(c) What is the rate of change of the angular momen-
tum of the ball about point P?
Figure P11.21

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