40 m80 mA race track is constructed such that two arcs of radius 80 m at A and40 m at 8 are joined by two stretches of straight track as in the figureabove.In a particular trial run, a driver travels at a constant speed of 50 m/s for one complete lap.(a) The ratio of the tangential acceleration at A to that at B is which of the following?O 1/2O 1/4O 2O 4O The tangential acceleration is zero at both points.(b) The ratio of the centripetal acceleration at A to that at B is which of the following?O 1/2O 1/4O 2O 4O The centripetal acceleration is zero at both points.(c) The angular speed is greatest at which of the following?O AO BO It is equal at both A and B.

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80 m 40 m A race track is constructed such that two arcs of radius 80 m at A and 40 m at 8 are joined by two stretches of straight track as in the figure above. In a particular trial run, a driver travels at a constant speed of 50 m/s for one complete lap. (a) The ratio of the tangential acceleration at A to that at B is which of the following? O 1/2 O 1/4 O 2 0 4 O The tangential acceleration is zero at both points. (b) The ratio of the centripetal acceleration at A to that at B is which of the following? O 1/2 O 1/4 O 2 0 4 O The centripetal acceleration is zero at both points. (c) The angular speed is greatest at which of the following? O A OB O It is equal at both A and B.

80 m 40 m A race track is constructed such that two arcs of radius 80 m at A and 40 m at 8 are joined by two stretches of straight track as in the figure above. In a particular trial run, a driver travels at a constant speed of 50 m/s for one complete lap. (a) The ratio of the tangential acceleration at A to that at B is which of the following? O 1/2 O 1/4 O 2 0 4 O The tangential acceleration is zero at both points. (b) The ratio of the centripetal acceleration at A to that at B is which of the following? O 1/2 O 1/4 O 2 0 4 O The centripetal acceleration is zero at both points. (c) The angular speed is greatest at which of the following? O A OB O It is equal at both A and B.

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

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

40 m
80 m
A race track is constructed such that two arcs of radius 80 m at A and
40 m at 8 are joined by two stretches of straight track as in the figure
above.
In a particular trial run, a driver travels at a constant speed of 50 m/s for one complete lap.
(a) The ratio of the tangential acceleration at A to that at B is which of the following?
O 1/2
O 1/4
O 2
O 4
O The tangential acceleration is zero at both points.
(b) The ratio of the centripetal acceleration at A to that at B is which of the following?
O 1/2
O 1/4
O 2
O 4
O The centripetal acceleration is zero at both points.
(c) The angular speed is greatest at which of the following?
O A
O B
O It is equal at both A and B.

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