A truck travelling due North at ` 50 km h^(-1)` turns Westamd travels at the same speed. What is the change in velocity ?

Answer

D

Explanation

Here, ` v_N= 50 km h^(-1)`,
change in veloicty ` = vec _w - vec v_N = vec v_w+ (- vecv_N0`
:. Magnitude of change in velocity
` = [ | v_w |^2 + |v_N|^2]^(1//2)`
`= (50^2 + 50^2)^(1//2) = 50 sqrt 2 ` South West .