Which of the following quantities is a velocity?
a
3 g/L in weight
b
10 km/hr eastward
c
25 m/s
d
15 m/s2
Velocity is a vector quantity that specifies both the speed of an object and the direction of its motion. Among the options provided:
b. 10 km/hr eastward - This is a velocity because it specifies both a speed (10 km/hr) and a direction (eastward).
Hence, option b is the correct choice for a velocity.
To clarify the other options:
a. 3 g/L in weight - This is a concentration or density, not a velocity.
c. 25 m/s - Although this specifies a speed, there is no direction given, so it is a speed but not a velocity.
d. 15 m/s^2 - This is an acceleration, as it indicates the rate of change of speed over time, not a velocity.