Question

A particle is moving eastward with velocity 5m/s. In 10s the velocity changes to 5m/s northwards. Calculate the average acceleration in this time and the direction.

Answer 1

$$| v | = \sqrt {4 5 ^ {2} + 5 ^ {2}} / 1 0 = 4 5. 3 / 1 0 = 4. 5 3$$

Direction tan a= 5/45=1/9