0 a wind blowing in the opposite direction to the one you are moving in: --
1 a wind blowing directly against you as you move forward: --
In the final, a strong headwind and light rain made it difficult for the competitors.
Bolt made the slowest start of the nine competitors and had to recover ground in cold conditions and against a 0.9 m/s headwind.
In the event of a headwind or tailwind, "heading" and course in an aircraft are theoretically identical.
They failed to take into account strong headwinds that slowed the plane and increased the time required to complete the crossing.
Aircraft usually have maximum headwind and crosswind components which they can not exceed.
Test pilots use crosswind and headwind component charts to calculate the headwind and crosswind component for any given wind direction and wind velocity.
His run of 9.99 seconds (achieved despite a headwind) was a new personal best.
The implied higher financing costs and the reduced access to credit are likely to interact with other headwinds, such as high oil prices and rising inflation, facing the global economy.
