The table shows how far a distance runner has traveled at various times during her race. What was her average speed, in miles per hour, during the interval 0.75 to 1.0 hours after she started her race?

Time (hours) Distance (miles)

2.00

0.50 3.50

0.75 4.75

1.00

Question

Everett Roth

Physics

16 March, 18:20

The table shows how far a distance runner has traveled at various times during her race. What was her average speed, in miles per hour, during the interval 0.75 to 1.0 hours after she started her race?

Time (hours) Distance (miles)

2.00

0.50 3.50

0.75 4.75

1.00

+1

Answers (1)

Know the Answer?

Xander Morrison · Answer 1

The average speed of a person is calculated by dividing the total distance traveled by the total time. For the interval between 0.75 hour and 1 hour which is equal to 0.25 hour, she traveled,

d = 4.75 miles - 3.50 miles = 1.25 miles

Dividing this by the total time,

s = 1.25 miles / 0.25 hour = 5 mph

The table shows how far a distance runner has traveled at various times during her race. What was her average speed, in miles per hour, during the interval 0.75 to 1.0 hours after she started her race?Time (hours) Distance (miles)2.000.50 3.500.75 4.751.00

The table shows how far a distance runner has traveled at various times during her race. What was her average speed, in miles per hour, during the interval 0.75 to 1.0 hours after she started her race?

Time (hours) Distance (miles)

2.00

0.50 3.50

0.75 4.75

1.00