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motion

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Secondary Information

Definition

Motion is the change in the position of an object over time relative to a reference point. Objects can move in a straight line, a circular path, or any other path.

The motion of an object can be described by its speed, velocity, and acceleration.

Speed is the rate at which an object is moving. It is measured in meters per second (m/s).

Velocity is the speed and direction of an object's motion. It is measured in meters per second (m/s) and direction.

Acceleration is the rate at which the velocity of an object is changing. It is measured in meters per second squared (m/s²).

The motion of objects can be affected by forces. Forces can cause objects to accelerate, decelerate, or change direction.

How can the word be used?

The crowd was in motion, everyone was moving around.

motion

Different forms of the word

Noun: The act of moving or the state of being moved.

Verb: To move or to cause to move.

Adjective: Relating to motion.

Etymology

The word "motion" comes from the Latin word "motus," which means "movement" or "change." The Latin word "motus" is derived from the Proto-Indo-European root "meh₂-," which also means "movement.".

The word "motion" was first used in English in the 13th century. It was originally used to refer to the movement of objects through space, but it is now used to refer to any kind of movement, including the movement of ideas or proposals.

Question

What is motion?

AQA Science Exam Question and Answer

Question:

Explain the concept of motion and discuss the factors that influence an object's motion. Provide examples to illustrate different types of motion.

Answer:

Motion refers to the change in an object's position with respect to a reference point over a period of time. It can be described in terms of distance, displacement, speed, and velocity. Several factors influence an object's motion, including forces, friction, and external influences.

Forces play a crucial role in determining the type of motion an object experiences. A balanced force results in no net motion, while an unbalanced force causes acceleration or deceleration. Friction, the resistance encountered during motion, affects an object's speed and direction. Other external factors like gravity, air resistance, and surface conditions can also impact motion.

There are three main types of motion:

  • Linear Motion: This involves an object moving along a straight line. For instance, a car moving along a straight road demonstrates linear motion.
  • Circular Motion: Here, an object moves in a circular path around a central point. A spinning top or a planet orbiting the sun are examples of circular motion.
  • Periodic Motion: This type of motion repeats itself at regular intervals. A swinging pendulum or a vibrating guitar string are examples of periodic motion.