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Re: ap physics homework help...

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lick is not online. lick
Joined: 17 Mar 2008
Total Posts: 4725
04 Nov 2015 07:27 PM
1. A 1488 -kg car moves on a horizontal curved road. If the radius of the curve is 49 m and the coefficient of friction between the tires and road is 0.1, find the maximum speed the car can have so that it may not skid.

2. In the Bohr model of the H-like atom, the speed of the electron is 2.2*10^6 m/s. If the radius of the atom is 1x10^-10 m, find the centripetal acceleration of the electron. The mass of the H-like atom is 100 au. 1au=1.67x10^-27kg. Show your answer as a decimal with four digits after the decimal point.

tbh idek why im posting this here because i probably wont get any answers
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Discourager is not online. Discourager
Joined: 27 Jul 2014
Total Posts: 18040
04 Nov 2015 07:27 PM
6
and
.222515
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lick is not online. lick
Joined: 17 Mar 2008
Total Posts: 4725
04 Nov 2015 07:28 PM
wrong and wrong but it allows for infinite tries so
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wishic is not online. wishic
Joined: 21 Feb 2013
Total Posts: 705
04 Nov 2015 07:35 PM
1) .67

2) 0.36

you said its wrong for the other ones, which leads me to think you already have the answer? why even ask.


Original Post
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lick is not online. lick
Joined: 17 Mar 2008
Total Posts: 4725
04 Nov 2015 07:37 PM
no i do not have the answer
and both of your answers are wrong
this is homework and it is not online to just google

idk what you are talking about when i said its wrong for the other ones i was talking to discourger
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Protossian is not online. Protossian
Joined: 25 Mar 2012
Total Posts: 4065
04 Nov 2015 07:37 PM
can someone explain to me what to do i wanna learn this xd
shoot me a pm explaining this shiz
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wishic is not online. wishic
Joined: 21 Feb 2013
Total Posts: 705
04 Nov 2015 07:38 PM
How would you know if it's wrong if you don't know what it is?..

oh and thnx i guessed.


Original Post
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lick is not online. lick
Joined: 17 Mar 2008
Total Posts: 4725
04 Nov 2015 07:39 PM
but i attempted #2 and i thought the answer was 8.028*10^-4 or 4.24*10^22 but ive tried putting it in scientific notation and it didnt work. i also just tried putting in the decimal number and not the exponent but it still said it was wrong and tbh i just gave up on it
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lick is not online. lick
Joined: 17 Mar 2008
Total Posts: 4725
04 Nov 2015 07:40 PM
there is a button i press that says check and it automatically says if the answer i put in is wrong or right so i can screenshot it for you if you want
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lick is not online. lick
Joined: 17 Mar 2008
Total Posts: 4725
04 Nov 2015 08:15 PM
wow i figured out the answer to #1

sqrroot(.1*48*9.8) = 6.9

i am not joking the answer was literally 6.9 m/s
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