What is a Vector?
Understanding relative velocity
Relative velocity concepts:
Velocity of the truck w.r.t ground,
V_t = + 80 km/hr (forward)
Velocity of the man w.r.t truck,
V_mt = - 80 km/hr (backward)
V_mt = V_m - V_t
Velocity of the man w.r.t ground,
V_m = V_mt + V_t
= - 80 + 80
= 0 km/ hr
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