Answer:
1. The velocity of an object must have both a magnitude and a direction
2. The equation s=d/t is used to calculate the speed of an object.
3. In the equation s=d/t, d stands for distance.
4. In the equation used to calculate acceleration, V stands for initial velocity and VF stands for final velocity.
Explanation:
1) Velocity is a vector, so as every vector, it has both a magnitude and a direction. Its magnitude, in particular, is defined as the ratio between the displacement and the time taken, while the direction corresponds to the direction of the displacement.
2-3) The speed of an object is a scalar quantity and it is defined as
[tex]s=\frac{d}{t}[/tex]
where d is the distance travelled by the object and t the time taken.
4) The acceleration of an object is given by
[tex]a=\frac{v_f -v}{t}[/tex]
where
[tex]v_f[/tex] is the final velocity
v is the initial velocity
t is the time taken
