Please answer all of the questions *THIS QUESTION IS WORTH 25 POINTS WILL MARK BRAINLIEST *

3. Newton's first law, or the law of inertia.

4. The balloon is filled with air, and is pushed by the air releasing from the balloon.

5. Newton's first law says any object at rest stays at rest and any object in motion stays in motion, unless affected by an outside force, the outside force is air resistance.

6. The weight is forcing the balloon down and there is some friction. Also, the air resistance acting upon the balloon is slowing it down. The balloon will also lose all of the air in the balloon.

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

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