"30 mph north" is an example of:
distance
velocity
displacement
speed

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot