What does a negative velocity mean?
To understand this question, it is important to know that velocity has both a direction and a magnitude. The magnitude can be expressed by the unit m/s, however the direction is expressed by a vector. To distinguish between two directions in velocity, you can have a positive and a negative vector: vectors that point in the opposite direction. Therefore, a negative velocity means that the direction of that velocity is opposite to the other velocity (with the positive value).
TD
Related Physics A Level answers
All answers ▸Why are electron volts used instead of Joules in Quantum Phenomena and how do you convert between the two?
The Σ0 baryon, composed of the quark combination uds, is produced through the strong interaction between a π+ meson and a neutron. π+ + n →Σ0 + X What is the quark composition of X?
Explain, in terms of the behaviour of molecules, how a gas exerts a pressure on the walls of its container. (4)
Why is the centripetal force necessary for circular motion?