What coefficients would balance the following equation?
__al + __o2 → __al2o3
a. 2al + 3o2 → 1al2o3
b. 2al + 3o2 → 2al2o3
c. 3al + 3o2 → 2al2o3
d. 4al + 3o2 → 2al2o3

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

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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