# Why do I feel centrifugal force If I move with constant speed on a turn?

Title sums it up pretty much, I'm studying for my physics exam right now and I just can't wrap my head around this

• Have you learned about changing reference frames and fictitious forces? – Quantum Mechanic Jun 14 at 16:49
• Constant speed is not always constant velocity. – Adrian Howard Jun 14 at 17:06

Acceleration is the change in velocity $$\frac{d\vec v}{dt}$$. Importantly $$\vec v$$ is a vector, meaning that it has both magnitude and direction. So changing the direction of your velocity vector is indeed an acceleration. In uniform circular motion your velocity vector is not constant because its direction is changing, even though the magnitude stays the same.