Which statement includes a description of velocity? (1 point)
• A marble rolls 30 centimeters away from the table.
• A bicycle moves 8 meters per second.
• A student walks 20 meters down the street.
• A car travels east at 45 kilometers per hour.
• A car travels east at 45 kilometers per hour.
On a position-time graph, which of the following does the value of the slope indicate about the object? (1 point)
change in position
O change in direction
• velocity
O total distance
• velocity
Every few years, different countries compete in a sailboat race called the America's Cup. The boats sail over the same distance. Besides distance, what else is needed to find out the speed of each boat in the race? (1 point)
• The combined size of the boats in the race.
• The time it takes for each boat to finish the race.
• The skill of the crew of each boat in the race.
• The wind speed during the race.
• The time it takes for each boat to finish the race.
The statement that includes a description of velocity is "A car travels east at 45 kilometers per hour."
The statement that includes a description of velocity is:
• A car travels east at 45 kilometers per hour.
Velocity is a vector quantity that describes the rate at which an object changes its position. It includes both the speed of an object and its direction. In this case, the statement "A car travels east at 45 kilometers per hour" provides both the speed (45 kilometers per hour) and the direction (east), making it a description of velocity.