GR0177 Ques 23

erc
Posts: 4
Joined: Sun Oct 30, 2005 2:42 pm

GR0177 Ques 23

Postby erc » Sun Oct 30, 2005 2:47 pm

I know I'm being really stupid, but I got the same wrong answer twice. Can anyone tell me what to do. Please?

A particle is constrained to move in a circle with 10m radius. Speed is 10m/s, increasing at a rate of 10m/s/s The angle between the particle\s velocity and acceleration vectors is
a) 0
b)30
c)45
d)60
e)90

Thanks in advance,

Dawood
Posts: 1
Joined: Wed Aug 25, 2004 5:49 am

Postby Dawood » Mon Oct 31, 2005 3:01 am

The answer should be 45 deg.
centripetal acc. is 10*10/10 = 10 and tangential is 10(given). so, the resultant is 10*sqrt(2) at an angle of 45 degs.

bye

erc
Posts: 4
Joined: Sun Oct 30, 2005 2:42 pm

Postby erc » Mon Oct 31, 2005 12:04 pm

Oh god...I am so going to fail. :cry:

Thanks for helping out a fool.




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