What information must a person have if they are asked to determine an object's speed?
Responses
distance and change in position
distance and change in position
distance and direction
distance and direction
period of time and direction
period of time and direction
distance and period of time
The information needed to determine an object's speed is distance and period of time.
It takes a car 1.75 h to go from mile marker 10 to mile marker 115.
What is the average speed of the car?
Responses
1.6 mph
1.6 mph
60 mph
60 mph
65 mph
65 mph
183 mph
To determine the average speed of the car, we need to divide the total distance traveled by the time taken. In this case, the total distance is 115 miles and the time taken is 1.75 hours.
Average speed = total distance / time taken
Average speed = 115 miles / 1.75 hours
Average speed ≈ 65.71 mph
Rounded to the nearest whole number, the average speed of the car is 66 mph.
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I apologize, it seems like there was an error in the response. The correct average speed for the car is approximately 65.71 mph.
A soccer player practices kicking the ball into the goal from halfway down the soccer field. The time it takes for the ball to get to the goal from the time it is kicked averages about three seconds. The soccer field is 90 meters long. The player wants to know the average velocity of the ball.
Is there enough information to calculate this?
Responses
Yes, displacement is 90 meters, elapsed time is three seconds, and the direction is toward the goal.
Yes, displacement is 90 meters, elapsed time is three seconds, and the direction is toward the goal.
No, only average speed can be calculated from the distance of 90 meters and the time of three seconds.
No, only average speed can be calculated from the distance of 90 meters and the time of three seconds.
Yes, displacement is 45 meters, elapsed time is three seconds, and the direction is toward the goal.
Yes, displacement is 45 meters, elapsed time is three seconds, and the direction is toward the goal.
No, only average speed can be calculated from the distance of 45 meters and the time of three seconds.
Yes, there is enough information to calculate the average velocity of the ball. The displacement is given as 90 meters, the elapsed time is three seconds, and the direction is toward the goal.
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This graph gives a record of a marble being rolled along the ground.
What was the marble's average speed for this entire trip?
Responses
0.67 m/s
0.67 meters per second,
1.5 m/s
1.5 meters per second,
1.5 mph
1.5 m p h,
15 m/s
15 meters per second,
Time from 0 to 10 seconds is represented on the x axis of this graph. Distance from 0 to 15 meters is represented on the y-axis of this graph. A line extends from the point 0,0 to 10 on the x-axis and 15 on the y axis in a straight line.