... of 0.6 m/s hits the toy plane during its flight. What is the velocity in m/s of the toy airplane relative to the Earth? (North is considered positive direction.)
Answers (1)
Assuming the wind isn't acting on the earth, the plane's speed (a scalar quantity) is 2.3 - 0.6. So 1.7m/s. However, it asks for velocity, not speed, and velocity is a vector quantity. The question suggests north is positive but the plane is flying 1.7m/s south. So with respect to the earth, it's flying at -1.7m/s.