cynthia sprints 60 meters in 5 seconds during soccer practice. what is her speed. please show your work

12 m/s

Explanation:

Speed can be found using the following formula.

where s is speed, d is distance traveled and t is the time.

We know that Cynthia sprinted 60 meters in 5 seconds. Therefore, the distance is 60 meters and the time is 5 seconds.

d=60

t=5

Substitute these values into the formula.

Divide

Add appropriate units. For this problem, the appropriate units would be meters per second, or m/s.

Cynthia's speed is 12 meters per second.

it is the second option.

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s