Final answer:
The average speed of the horse that ran 140 m in 20 sec is 7 m/s.
Step-by-step explanation:
To find the average speed of the horse, we need to divide the total distance traveled by the total time taken. In this case, the horse ran 140 m in 20 seconds. So, the average speed is:
Average speed = Total distance / Total time = 140 m / 20 s = 7 m/s
Therefore, the correct option is v = 7 m/s.
To find the average speed of a horse that ran 140 m in 20 sec, you divide the total distance by the total time. Using the formula for average speed v = d/t, where d is distance and t is time, we calculate the horse's average speed as follows:
v = 140 m / 20 s = 7 m/s.
Therefore, the correct option is Option 1: v = 7 m/s. This average speed indicates how fast the horse was traveling overall during its 20-second run. Comparing the given options, it is quite clear that 7 m/s is the only reasonable value for the average speed of a horse over such a distance and time. Other options are unreasonably high for the speed of a horse.