A car is moving in direction →r=−4^i+3^j with a speed of 10m/s. Write velocity vector of car in vector notation.
−8^i+6^jm/s
Direction of motion of car is along the unit vector →r
^r=4^i+3^j√42+32=−45i+35j
Thus velocity vector of car equal to →v=|→v|^r
→v=(10m/s)(−45→i+35^j)=(−8^i+6^j)m/s