To find out the speed of each boat in the race, you need the time it takes for each boat to finish the race. Speed is calculated by dividing the distance by the time taken to cover that distance.
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)
Responses
The skill of the crew of each boat in the race.
The skill of the crew of each boat in the race.
The time it takes for each boat to finish the race.
The wind speed during the race.
The wind speed during the race.
The combined size of the boats in the race.
11 answers
The picture shows a ball rolling up a ramp.
Which statement best describes the motion of the ball?
(1 point)
Responses
The speed of the ball is increasing.
The speed of the ball is increasing.
The speed of the ball is decreasing.
The speed of the ball is decreasing.
The motion of the ball is constant.
The motion of the ball is constant.
The motion of the ball is stopping.
Which statement best describes the motion of the ball?
(1 point)
Responses
The speed of the ball is increasing.
The speed of the ball is increasing.
The speed of the ball is decreasing.
The speed of the ball is decreasing.
The motion of the ball is constant.
The motion of the ball is constant.
The motion of the ball is stopping.
The statement that best describes the motion of the ball rolling up a ramp is "The speed of the ball is decreasing." As the ball rolls up the ramp, it is moving against gravity, which causes its speed to decrease until it eventually stops and may roll back down.
The graph shows the motion of a horse during the first portion of a race.
Which statement is true about the horse's motion?
(1 point)
Responses
The horse maintained a constant velocity during this portion of the race.
The horse maintained a constant velocity during this portion of the race.
The horse maintained a constant acceleration during this portion of the race.
The horse maintained a constant acceleration during this portion of the race.
The horse decreased its velocity during this portion of the race.
The horse decreased its velocity during this portion of the race.
The horse increased its acceleration during this portion of the race.
The horse increased its acceleration during this portion of the race.
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Which statement is true about the horse's motion?
(1 point)
Responses
The horse maintained a constant velocity during this portion of the race.
The horse maintained a constant velocity during this portion of the race.
The horse maintained a constant acceleration during this portion of the race.
The horse maintained a constant acceleration during this portion of the race.
The horse decreased its velocity during this portion of the race.
The horse decreased its velocity during this portion of the race.
The horse increased its acceleration during this portion of the race.
The horse increased its acceleration during this portion of the race.
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Without seeing the actual graph, I can't provide a definitive answer. However, if the graph shows a straight line with a positive slope, the statement "The horse maintained a constant velocity during this portion of the race" would be true. If the line is curved upwards, then the statement about constant acceleration may be true. If the line slopes downward, then the horse decreased its velocity.
Please refer to the trend shown in the graph to determine which statement is accurate based on the horse's motion.
Which statement is an example of velocity?(1 point)
Responses
A ball rolls 50 centimeters away from the table.
A ball rolls 50 centimeters away from the table.
A student walks 20 meters down the street.
A student walks 20 meters down the street.
A skateboard moves 2 meters per second.
A skateboard moves 2 meters per second.
A car travels east at 55 kilometers per hour.
Responses
A ball rolls 50 centimeters away from the table.
A ball rolls 50 centimeters away from the table.
A student walks 20 meters down the street.
A student walks 20 meters down the street.
A skateboard moves 2 meters per second.
A skateboard moves 2 meters per second.
A car travels east at 55 kilometers per hour.
The statement that is an example of velocity is "A car travels east at 55 kilometers per hour." Velocity is a vector quantity that includes both speed and direction, whereas the other options either measure distance without direction or measure speed only.
Which characteristic is constant for the car as it travels around the roundabout pictured below?
(1 point)
Responses
Speed
Speed
Velocity
Velocity
Position
Position
Direction
(1 point)
Responses
Speed
Speed
Velocity
Velocity
Position
Position
Direction
As the car travels around the roundabout, the characteristic that is constant is speed. While the speed may remain constant, the velocity (which includes both speed and direction) changes continuously as the car changes direction around the roundabout. Position also changes, and direction is continually changing.
On a position-time graph, which of the following does the value of the slope indicate about the object?(1 point)
Responses
Change in direction
Change in direction
Total distance
Total distance
Velocity
Velocity
Change in position
Responses
Change in direction
Change in direction
Total distance
Total distance
Velocity
Velocity
Change in position
On a position-time graph, the value of the slope indicates the velocity of the object. The slope shows how quickly the position of the object changes over time.
13 answers