Agood model of the solar system to present to elementary is the ptolemaic model. a) true b) false

The answer is:

B. false

Here's why:

The Ptolemaic model is not accurate and this is because the model is geocentric. This means that this model was developed with the assumption  that the Earth was the center of the universe and the sun and the planets revolved around it. Science has already proven that this is not true.

This model was developed by Claudius Ptolemy.

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