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.
O The time it takes for each boat to finish the race.
O 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 is needed to find out the speed of each boat.
Which statement is an example of velocity? (1 point)
• A ball rolls 50 centimeters away from the table.
A car travels east at 55 kilometers per hour.
O A student walks 20 meters down the street.
• A skateboard moves 2 meters per second.
A skateboard moves 2 meters per second is an example of velocity.
On a position-time graph, which of the following does the value of the slope indicate about the object?
(1 point)
• Change in direction
O Change in position
• Velocity
• Total distance
The value of the slope on a position-time graph indicates the velocity of the object.
Which situation is an example of negative acceleration? (1 point)
O A bicycle increasing its velocity as the rider pedals harder
• A diver jumping off a diving board and falling to the swimming pool below
O A jogger slowing down at the end of a race
• A car moving at a constant velocity