Which choice represents velocity?(1 point)%0D%0AResponses%0D%0A%0D%0A15 km/hr west%0D%0A15 km/hr west%0D%0A%0D%0A35 m/s%0D%0A35 m/s%0D%0A%0D%0A4 g/mL%0D%0A4 g/mL%0D%0A%0D%0A12 m/s2%0D%0A12 m/s2
The choices that represent velocity are:
15 km/hr west
15 km/hr west
35 m/s
35 m/s
Velocity is a vector quantity that measures the rate at which an object changes its position. It has both magnitude (speed) and direction. In the given choices, the options that represent velocity are:
1. 15 km/hr west
2. 35 m/s
To determine which option represents velocity, we need to look for quantities that have both a value (magnitude) and a direction.
Option 1, "15 km/hr west," indicates a speed (magnitude) of 15 km/hr and a direction of west. This means that there is motion involved, and the object is moving towards the west. Therefore, this option represents velocity.
Option 2, "35 m/s," also indicates a speed (magnitude) of 35 m/s. Although it doesn't explicitly mention the direction, the absence of a direction suggests that it is moving in a straight line. In this case, we assume it is moving in the positive direction. Thus, 35 m/s also represents velocity.
The other options ("4 g/mL" and "12 m/s2") do not represent velocity as they either lack a direction or describe different quantities (density and acceleration, respectively).