Gravity is affected by (1 point) force only. force and distance. mass and distance. force and mass.

Gravity is affected by (3) Mass and Distance

Explanation:

The amount of gravity that something possesses is proportional to its mass and distance between it and another object. This relationship was first published by Issac Newton. His law of universal gravitation says that the force (F) of gravitational attraction between two objects with Mass1 and Mass2 at distance D is:

Where,

G = gravitational constant

m1 = mass of object 1

m2 = mass of object 2

D = distance between the two objects

An object with greater mass exerts greater force of gravity on it.

F = mg

Where,

F = force

m = mass

g = gravity

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