Question

An aeroplane is moving on a circular path with a speed of 250kmhr−1 The change in its velocity in half revolution is

Answer 1

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

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 (1)

final velocity = 250(-1)

change = 250 + 250 = 500