Science test flashcards: Motion

Motions test

Distance:

Refers to the length an object travels along a path. Meausred in metres

Displacement:

The length and direction of an object from its origin. Measured in metres and is also used for the change in length when an object is compressed or stretched.

Speed:

How fast something travels.

It is a measure of the distance travelled, divided by the amount of time it took to travel that distance.

Time = distance divided by speed

Distance = speed x time

Average speed:

The total distance an object travels, divided by the time it takes to do so.

Measured by Distance divided by time.

Instantaneous speed:

The speed of an object, measured at a particular moment in time.

Displacement:

An object’s position from where it started to where it finished.

Velocity:

How fast something travels in a particular direction.

Measured by: Displacement divided by time

Average velocity:

The rate at which an object is displaced or changes position over a time interval.

Instantaneous velocity:

Change in displacement divided by change in time.

Constant velocity:

When an object is travelling at the same speed without changing direction.

Acceleration (speeding up):

The change in velocity of an object divided by time.

Deceleration (slowing down):

Change in velocity divided by the time when it is slowing down.

Stationary:

It is not moving

Newtons first law of inertia:

An object in motion will stay in motion unless acted upon by an external force.

Inertia:

The tendency of an object to resist a change in its state of motion.

Net force:

The sum of all forces acting upon an object.

Newtons second law of motion:

The net force on an object equals the mass of the object multiplied by its acceleration.

Mass:

The quantity of matter in an object, regardless of its volume or any forces acting on it.