I only need help on 1C) I don't understand how i can get my answer close to 70.7 m/s i don't understand what I'm missing when I've tried findind the angular speed(w) as (v/r) but that only gives me a very small number and when changing the equation to v=wr doesn't seem to help either I'm not sure what I'm doing wrong, please show and explain to me, thank 1. A racetrack is constructed such that two arcs of radius 80 m at A and 40 m at B are joined by twostretches of straight track as shown. In a particular trial run, a driver travels at a constant speed of50 m/s for one complete lap. Let the magnitude of the centripetal acceleration of the car be ac, andthe magnitude of the tangential acceleration be at.A) Which of the following is true?a. At point A, a atC. At point A, ac > a, and at point B, ac a, and at point B, ac > at.At point A, a = a, and at point B, ac = at.e.B) What is the ratio (acB/acA) of the centripetal acceleration at B to that at A?a. 4b. 2c. 1/2d. 1/4e. None of the above48 = Aa. 81.9 m/sb.70.7 m/sC. 55.1 m/sd. 35.4 m/se. None of the above4080Faster=15028040 mC) The maximum speed the car can safely go around curve B is 50.0 m/s. With what maximumspeed can the car safely go around curve A?31.25 = 250080LOMShwer80 m

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Answered: 1. A racetrack is constructed such that…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And Gravitation

Section: Chapter Questions

Problem 12CQ: A child is practicing for a BMX race. His speed remains constant as he goes counterclockwise around...

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I only need help on 1C) I don't understand how i can get my answer close to 70.7 m/s

i don't understand what I'm missing when I've tried findind the angular speed(w) as (v/r) but that only gives me a very small number and when changing the equation to v=wr doesn't seem to help either

I'm not sure what I'm doing wrong, please show and explain to me, thank

1. A racetrack is constructed such that two arcs of radius 80 m at A and 40 m at B are joined by two
stretches of straight track as shown. In a particular trial run, a driver travels at a constant speed of
50 m/s for one complete lap. Let the magnitude of the centripetal acceleration of the car be ac, and
the magnitude of the tangential acceleration be at.
A) Which of the following is true?
a. At point A, a <a, and at point B, ac<at..
b. At point A, a <a, and at point B, ac > at
C. At point A, ac > a, and at point B, ac<at.
d. At point A, ac > a, and at point B, ac > at.
At point A, a = a, and at point B, ac = at.
e.
B) What is the ratio (acB/acA) of the centripetal acceleration at B to that at A?
a. 4
b. 2
c. 1/2
d. 1/4
e. None of the above
48 = A
a. 81.9 m/s
b.
70.7 m/s
C. 55.1 m/s
d. 35.4 m/s
e. None of the above
40
80
Faster
=1502
80
40 m
C) The maximum speed the car can safely go around curve B is 50.0 m/s. With what maximum
speed can the car safely go around curve A?
31.25 = 2500
80
LOM
Shwer
80 m

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