Question

a train travels from the bottom of a hill to the top of a hill, its moves slower by the time it reaches the top is an example of

positive acceleration
velocity
negative acceleration
speed

Answer 1

Acceleration, in physics, is the rate at which the velocity of an object changes over time.

\(\sf \large \color{red}{Positive~Acceleration}\)
Positive acceleration is when the acceleration
of an object speeds up, like dropping something
off a skyscraper. Every second that object is falling,
it will get faster.

\(\sf \large \color{red}{Velocity}\)
Velocity is the rate of change of the position
of an object

\(\sf \large \color{red}{Negative~Acceleration}\)
Negative Acceleration is when the acceleration
of an object slows down, like throwing something
in the air. It will get slower going up, and then
it will stop, that is the negative acceleration, and
then the object will come back down, and will
speed up, which is positive acceleration.

\(\sf \large \color{red}{Speed}\)
Speed is the rate at which someone or something
is able to move or operate.

Answer 2

Hope this helps!

Answer 3

it does thank you very much!