IF the radius curve around which a car is driven is increased, the following can be said about the centripetal

Question

force requiered to cause the car to go around the corner at constant speed:

a. the centripetal force increases
b. the centripetal force decreases
c. the centripetal force remains the same
d. none of the above

I think it's d using common sense I can't find this at google or my textbook so am I right or wrong

Answer 1

for circular motion required centripetal force = M*V^2/R;
where M is the mass of the body, V is the speed of the body and r is the the radius of curvature of circular path; therefore it is clear from above formula that if mass and moving speed of body are constant then required centripetal force is inversely proportional to radius of curvature of circular path;
therefore ans is (b)

Answer 2

Look at the equation, F = mv^2/r. When r increases, what happens to F?