Comments on: An airplane flying at 115 m/s due east makes a gradual turn? http://airtim.es/airplane-flying/an-airplane-flying-at-115-ms-due-east-makes-a-gradual-turn Thu, 18 Feb 2010 13:05:59 -0600 http://wordpress.org/?v=abc hourly 1 By: SidneyTalent http://airtim.es/airplane-flying/an-airplane-flying-at-115-ms-due-east-makes-a-gradual-turn/comment-page-1#comment-5032 SidneyTalent Sat, 14 Nov 2009 23:03:59 +0000 http://airtim.es/airplane-flying/an-airplane-flying-at-115-ms-due-east-makes-a-gradual-turn#comment-5032 1) ma = mv^2/r a= v^2/r a = 115^2 / r find 'r' by figuring out how much it travelled (this will be a quarter of a circle since it makes a 90 degree turn). d = 115 x 15 d = 1725m C = 1725 x 4 (since its a quarter) C = 6900m now find 'r' C = 2pi*r 6900 = 2pi*r r = 6900/2pi r = 1098m plug info back to a=v^2/r a = 115^2 /1098 a = 12.04 m/s^2 2) C...constant speed on straight road = no accel and since B is in circular motion...direction always changes..therefore accel on car B. 3) you need to find the Fg on Mercury...then use F = mg<br><b>References : </b><br> 1) ma = mv^2/r

a= v^2/r
a = 115^2 / r

find ‘r’ by figuring out how much it travelled (this will be a quarter of a circle since it makes a 90 degree turn).

d = 115 x 15
d = 1725m

C = 1725 x 4 (since its a quarter)
C = 6900m

now find ‘r’

C = 2pi*r
6900 = 2pi*r
r = 6900/2pi
r = 1098m

plug info back to a=v^2/r

a = 115^2 /1098
a = 12.04 m/s^2

2) C…constant speed on straight road = no accel and since B is in circular motion…direction always changes..therefore accel on car B.

3) you need to find the Fg on Mercury…then use F = mg
References :

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