When you know both the speed and direction of an object’s motion, you know the

Answer:

When you know both the speed and direction of an object's motion, you know the velocity of the object.

When you know both the speed and direction of an object’s motion, you know the magnitude of the speed and direction in which it is moving.

Speed is a rate of change of distance with respect to time. i.e. v =dx÷dt.

Speed can also be defined as distance over time

i.e. speed= distance ÷ time

it is denoted by v and its SI unit is m/s. it is a scalar quantity. i.e. it has only magnitude not direction. ( velocity is a vector quantity, it has both magnitude and direction. when we define velocity, we should know about its direction)

Speed shows how much distance can be traveled in unit time.

As speed is scalar quantity it has nothing to do with the direction. but when magnitude of speed is given and the direction as well, then we can say that a car or body is moving with this much speed at this direction(east, north, west, south).

To know more about Speed, click :

https://brainly.com/question/30462853

#SPJ2

Select the reset button on the lab activity. Select the boy icon. Select the middle note located
in the bottom right of the lab activity. Select the GO button. What happened to the pitch of the
sound as the sound source moved past the observer? Record your observations.