Posted by star on .
if a stone at the end of a string is whirled in a circle, the inward pull on the stone
A) is known as the centrifugal force
B) is inversely proportional to the speed of the object
C) is inversely proportional to the square of the speed
D) is proportional to the speed
E) is proportional to the square of the speed
plzz help me soon

physics 
Elena,
A) is known as the centrifugal force
E) is proportional to the square of the speed 
physics 
SAQLAIN,
is propotional to the square of speed
as we know that
fc=mv^2/r 
physics 
Muhammad Riaz,
proportional to the speed

physics 
azeem,
A) is known as the centrifugal force