Physics, 18.02.2020 22:38 Jennitiu

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.

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Answer from: alexapacheco012

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.

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Answer from: Quest

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