Question

A motorcar is moving northwards with velocity 30 m/s. If it turns towards West with the same speed, then change in its velocity is?
(A) 60 m/s North-West
(B) 30 â2 m/s South-West
(C) 30 â2 m/s South-West
(D) 60 m/s South-West

Answer 1

Answer:

30√2 m/s South West

Explanation:

Initial Velocity = 30 m/s  towards North

=> 30 j

Final Velocity = 30 m/s towards West

=> - 30 i

Change in Velocity = Final Velocity - Initial Velocity

= -30i - 30j

= - 30i - 30j

i & j both are negative

so South West Direction

Magnitude = √30² + 30²  = 30√2

30√2 South West m/s