Question

A building superintendent twirls a set of keys in a circle at the end of a cord. If the keys have a centripetal acceleration of 110 m/s2 and the cord has a length of 0.25 m, what is the tangential speed of the keys?

Answer 1

Solution:

a=V*V/R

so

V=sgrt(a*R)=sgrt(110*0.25)=sgrt(27.5)=5.24

ANSWER:

V=5.24 m/s