Question

an aeroplane is moving in a circular path with a speed 250km/hr; what is change in velocity in half revolution?
a)500km/hr
b)250km/h
c)125km/hr
d)zero

explain with method....​

Answer 1

answer c ) 125km/hr i am not much sure if there is any formula

Answer 2

after half revolution direction of velocity is opposite to initial direction ...
if initial direction is along +x axis then after half revolution its direction will become towards -x ..
initial velocity = 250 (i)
final velocity = 250(-i)
change = 250 + 250 = 500
approve if u like my ans