A race car has a centripetal acceleration of 13.33 m/s2 as it goes around a curve. If the curve is a circle with radius 30 m, what is the speed of the car?

Question

roadjester · Answer

you you know the equation for centripital acceleration?

anonymous · Answer

is it a=v2x30 or something

roadjester · Answer

a_c = v^2/r
does this look familiar?

anonymous · Answer

it does, but i don't know where to put the numbers...

roadjester · Answer

ok, a_c is acceleration, notice it starts with the letter "a"
v is velocity--> it starts with the letter v
radius starts with the letter r

does that make sense?

anonymous · Answer

ahhh... what that underline a_c?

roadjester · Answer

the underscore means that c is a subscript of a

roadjester · Answer

a(subscript) c represents centripital acceleration

anonymous · Answer

And what does that mean?

roadjester · Answer

one second
i'll attach a picture

anonymous · Answer

do i multiply a and c?

roadjester · Answer

no, i'll show you, just give me like 2 minutes

roadjester · Answer

ok this is from my physics textbook
take a look

roadjester · Answer

@marius.roine 
does this make more sense?