Question

Which pair of variables defines motion?

Answer 1

The pair of variables that defines motion that defines motion is a change of position and passage of time.

When a body changes its position with regards to time, such a body is said to be in motion. For example: A book that falls and water that rushes out of the tap all display motion.  

Further Explanation

All the physical process of the entire planet is made up of motion and motion can either be slow or quick. However, motion can be defined in terms of distance, time, displacement and speed.

There are different types of motion and these include:

• Translational motion
• Rotational motion
• Oscillatory motion

In translational motion, all part of the object moves in the same distance and time.  A perfect example of translational motion is a moving vehicle.

Rotational motion: a body is said to be in rotational motion if the body moves on its own axis. A perfect example rotational motion is the Earth because it moves on its own axis.

Oscillatory motion: an object will be in oscillatory motion if it repeatedly moves about the same position.

However, other types of motion also include:

• Uniform motion
• Non uniform motion
• One dimensional motion
• Two dimensional motion
• Three dimensional motion

LEARN MORE:

• Which pair of variables defines motion?  brainly.com/question/9530691
• Projectile motion is a combination of which two types of motion?  brainly.com/question/10343223

KEYWORDS:

• motion
• variables
• oscillatory motion
• uniform motion
• displacement
• change of position
• passage of time

Answer 2

Answer: position (x) and time (t)

Explanation:

A body is said to be in motion when its position changes with time with respect to a stationary observer.

Following are the types of motion:

Uniform motion: When equal amount of distance is covered in equal intervals of time.

Non-Uniform motion: When unequal amount of distance is covered in equal intervals of time.

Motion can be of the following types as well:

Rectilinear motion: when object moves in a straight line.

Circular motion: when object moves in a curved path.

Periodic motion: when motion repeats itself in fixed intervals of time.

Thus, in order to define motion, only two variables are required: position and time. Measuring these variables can determine whether the object is in motion or not and the type of motion.