MYP Physics Grade 9/MYP 4 Movement and Position

These flashcards cover key physics concepts related to movement and position, including speed, acceleration, and how to interpret distance and velocity-time graphs.

Average Speed

The total distance traveled divided by the total time taken.

Metres per Second (m/s)

The standard unit of speed in physics.

Distance Formula

The mathematical formula to calculate distance: distance = speed x time.

Speed Conversion

The process of converting between different speed units, such as km/h and m/s.

1 km/h to m/s

1 kilometre per hour equals approximately 0.28 metres per second.

Question 1 Average Speed

The average speed of a car that covers 500m in 20s is 25 m/s.

Sound Wave Speed

Sound waves travel at approximately 340 m/s through air.

Slope of Distance-Time Graph

The slope reflects the speed; a steeper slope indicates a higher speed.

Velocity

The speed of an object in a specific direction.

Acceleration

The rate of change of velocity over time, measured in m/s².

Deceleration

A reduction in speed, often referred to as negative acceleration.

Gradient of a Velocity-Time Graph

The slope of a velocity-time graph represents acceleration.

Distance Travelled by a Velocity-Time Graph

The area under the velocity-time graph represents the total distance travelled.

Final Velocity Calculation

Calculated using the formula: final velocity = initial velocity + (acceleration x time).

Deceleration Calculation

Calculated as the change in velocity over time, often resulting in a negative acceleration.

Constant Speed

When an object travels at uniform speed over time.

Displacement

The distance moved in a specific direction; a vector quantity.

Velocity-Time Graph

A graphical representation where the slope indicates acceleration.

Change in Velocity

Calculated as final velocity minus initial velocity.

Gradient of a Distance-Time Graph

Used to determine the speed of an object.

Vertical Line on Graph

Indicates a period of stationary movement.