1. Describe the motion of an object with positive velocity and negative acceleration.2. Describe the motion of an object with negative velocity and positive acceleration.3. Describe the motion of an object with negative velocity and negative acceleration.

The answer to the question above is explained below

Explanation:

Acceleration is the rate of change of velocity.  In other words, acceleration is a change in either speed or direction, or both. An object is accelerating if it is changing its velocity, and, the SI units for acceleration are m/s2 (meters per second squared).

Velocity is a vector, and it is the speed at which an object moves in one direction. So in other words, velocity is the displacement of an object with respect to time.

For question 1 "Describe the motion of an object with positive velocity and negative acceleration"

Answer to question 1

A body moving in the positive direction has a positive velocity. While, a body can have negative acceleration, if the acceleration is in the opposite direction to the velocity of that body. So, addition or subtraction from the value of velocity is dependent on the direction of the acceleration. A negative acceleration means there will be subtraction from the value of the velocity.

For question 2 "Describe the motion of an object with negative velocity and positive acceleration."

Answer to question 2

An object which moves in the negative direction has a negative velocity. If the object is slowing down then its acceleration is directed in the opposite direction as its motion which leads to a positive acceleration. A negative velocity and a positive acceleration implies for example, an object going in negative direction whose speed is getting reduced.

For question 3 "Describe the motion of an object with negative velocity and negative acceleration."

Answer to question 3

The motion of an object where velocity and acceleration are both negative, the object experience an increase in speed, meaning the acceleration is in the same direction as the velocity.

carbon is found in all living things. carbon atoms move constantly through

living organisms, the oceans, the atmosphere, and the earth’s crust in what is

known as the carbon cycle. the directions taken by carbon atoms through this

cycle are very complicated and can take millions of years to make a full circle.

all animals, from humans to the dinosaurs are part of the carbon cycle. when

animals eat food, they get carbon in the form of carbohydrates and proteins.

in animals, oxygen combines with food in the cells to produce energy for daily

activity and then gives off carbon. the carbon combines with oxygen to form

carbon dioxide (co2) and is released back into the atmosphere as a waste

product when animals breathe and exhale.

from 145-65 million years ago, earth was much

hotter than today and covered with dense,

tropical swamp forests. the trees and other

plants were immense and

provided an endless supply of

food for the giant animals that

roamed the land. somewhere in

the air above one of these

forests, a lone carbon atom has joined

up with two oxygen atoms to form a molecule of co2.

the co2 molecule was sucked into the tiny holes (stomata) on the leaf of a

fern plant and joined with sunlight, chlorophyll and water to make food and

energy in the plant’s cells through photosynthesis. the oxygen (o2) from the

co2 molecule was sent back into the atmosphere; the carbon atom (c) was

detached and used to make a molecule of sugar.

if that carbon atom had been eaten instead, a totally

different situation would have developed. let’s say

that a giant plant-eating dinosaur (herbivore) ate the

fern for breakfast, and swallowed the carbon in the

fern in the form of carbohydrates and proteins. in

the process of respiration, oxygen combined with

the carbohydrates and proteins in the dinosaur’s cells

to provide energy for its daily activity.