The chart shows data for four heat engines.

A 3 column table with 4 rows. The first column is labeled heat engine with entries W, X, Y, Z. The second column is labeled T Subscript h Baseline in Kelvin with entries 620, 840, 900, 500. The last column is labeled T Subscript c Baseline in Kelvin with entries 120, 100, 300, 25.

Which lists the engines from most efficient to least efficient?

Y, X, W, Z
Z, W, X, Y
Z, X, W, Y
Y, W, X, Z

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

answercollision;