Question

while racing on a flat track, a car rounds a curve of 28m radius and instantaneously experiences a centripetal acceleration of 18 m/s2. how fast was the car going?
how would you go about doing this?

Answer 1

you need to use the equations of uniform circular motion

(see here: http://www.sparknotes.com/physics/dynamics/uniformcircularmotion/section1.rhtml)

for this problem you need \(\sf \large a=\dfrac{v^2}{r}\rightarrow v=\sqrt{ar}\)

Answer 2

so would that mean that its the square root of 504?

Answer 3

yep

Answer 4

thank you :)

Answer 5

no problem !