A vector is a quantity that has a magnitude and a direction. Examples of quantities that have a magnitude and direction are displacement, velocity, acceleration, and force. With displacement, you can specify the direction as well as the net distance that the object has moved by.
The difference between speed and velocity is that speed only specifies the speed that an object is moving at, but doesn't establish the direction the object is moving in. However, velocity specifies the magnitude, which includes speed and direction. Similar to velocity, we have acceleration. A form of acceleration is gravity, and we know that this always acts downward and is always approximately 9.81 m/s2 – well, at least on Earth. It is 1/6th of this on the moon.
An example of force is weight. Weight also acts downward and is calculated as mass multiplied by acceleration.
Vectors...
