Which choice represents velocity a. 15 km/he west b. 12m/s2, c. 4g/ml d. 35m/s
The choice that represents velocity is d) 35 m/s.
Among the given choices, the only option that represents velocity is option d. 35 m/s. Velocity is a vector quantity that represents the rate at which an object changes its position in a specific direction. It is usually expressed in terms of distance traveled per unit of time, in a specific direction. In this case, the velocity is given as 35 m/s, which indicates that an object is moving with a speed of 35 meters per second in a specific direction.
The choice that represents velocity is (d) 35 m/s.
Velocity is a vector quantity that expresses the rate at which an object changes its position. It has both magnitude and direction. In this case, the magnitude of the velocity is given as 35 m/s.
To identify the choice that represents velocity, let's examine the provided options:
a. 15 km/hr west: This represents speed (magnitude of velocity), but it does not give the direction explicitly. Velocity requires both magnitude and direction, so this is not the correct choice.
b. 12 m/s^2: This represents acceleration, not velocity. Acceleration is the rate at which velocity changes over time, measured in m/s^2. Since velocity has already been established, this choice is not correct.
c. 4 g/ml: This represents density, measured in grams per milliliter. It is a measure of mass per unit volume and is not related to velocity. Therefore, it is not the correct choice.
d. 35 m/s: This choice represents velocity. It has the magnitude (35 m/s) and does not have any other units such as time or volume associated with it. Hence, it is the correct answer.
Remember, when determining velocity, consider both the magnitude and the associated direction.