Which statement includes a description of velocity?
1. A car travels east at 45 kilometers per hour
2. A bicycle moves 8 meters per second
3. A student walks 20 meters down street
4. A marble rolls 30 centimeters away from the table
Statement 2. A bicycle moves 8 meters per second.
The statement that includes a description of velocity is statement 2: "A bicycle moves 8 meters per second."
The statement that includes a description of velocity is: "A car travels east at 45 kilometers per hour."
Explanation:
Velocity is a measure of how fast an object is moving in a specific direction. In order to describe velocity, both the speed and direction of the object's motion must be included.
Option 1 states that a car is traveling east at a speed of 45 kilometers per hour. This statement includes both the speed (45 kilometers per hour) and the direction (east), so it describes velocity.
Option 2 only provides the speed (8 meters per second) but does not specify the direction, so it does not describe velocity.
Option 3 mentions a student walking 20 meters down the street, but it does not mention any speed or direction, so it does not describe velocity.
Option 4 mentions a marble rolling 30 centimeters away from a table, but it does not mention any speed or direction, so it also does not describe velocity.