Which of the following statements are true about gravity? Check all that
apply.

A. Gravity doesn't exist between two stars that are far far away from
each other.

B. Gravity exists only near Earth.

C. Gravity exists between two objects, but only when they're close
enough to affect each other.

D. Gravity is a force that pulls two objects together.

E. Gravity exists between two objects that have mass,

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