Leg of Race Time (h) Distance (km) Skate 1.25 20
Row 0.75 6
Bike 2.5 100

Lily entered a skate, row, and bike race. Her time and distance for each leg of the race are entered in the chart.
What was her average speed for each leg of the race?
What was her average speed over the whole race?

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

access to city

explanation: