A particle is moving eastwards with a velocity of 5 ~m / s . In 10 ~s , the velocity changes to 5 ~m / s northwards. The average acceleration in this time is

Step-by-step solution

Velocity in eastward direction =5 i velocity in northward direction =5 j Acceleration a = 5 j -5 i 10 or a = 1 2 j - 1 2 i or | a |= ( 1 2 )^2+ (- 1 2 )^2 or | a |= 1 2 ~m ~s ⁻² towards north-west.