which choice represents velocity.
A. 12m/s2
B. 35m/s
C. 4 g/mL
D. 15 km/hr west
B. 35m/s
The choice that represents velocity is B. 35m/s.
Velocity is a physical quantity that describes the rate at which an object changes its position. It has both magnitude and direction. In this case, the magnitude of the velocity is 35 meters per second, which represents how fast the object is moving. The choice B also includes a unit of measurement (m/s), which is commonly used to express velocity.
To determine the velocity, it is important to consider both the magnitude and the direction. In this case, the magnitude is given as 35m/s, indicating the speed at which the object is moving. However, the direction is not explicitly mentioned in choice B. It is crucial to note that velocity is not just a measure of speed but also includes the direction in which the object is moving.
It is important to keep in mind that option D, "15 km/hr west," also includes a direction (west). While option D includes the correct information regarding direction, it is measured in kilometers per hour (km/hr) instead of meters per second (m/s), which is the standard unit for velocity in the International System of Units (SI).
The correct choice that represents velocity is B. 35m/s.
Velocity is a vector quantity that measures the rate at which an object changes its position. It includes both magnitude, which is the numerical value, and direction.
Option A, 12m/s^2, represents acceleration rather than velocity. It indicates the rate at which an object's velocity changes over time.
Option C, 4 g/mL, represents density, which is the mass of a substance per unit volume. It does not represent velocity.
Option D, 15 km/hr west, represents velocity. It indicates that an object is moving at a speed of 15 kilometers per hour in the west direction. However, the question specifies that we are looking for the choice that represents velocity without specifying a direction, so option B is the most appropriate choice.