# Speed and/or velocity calculations. Acceleration calculations. Note the difference between speed and velocity. Use of correct SI units for Speed (m/s) and Acceleration (m/s^2) and... Speed and/or velocity calculations. Acceleration calculations. Note the difference between speed and velocity. Use of correct SI units for Speed (m/s) and Acceleration (m/s^2) and Forces (N). Plotting graphs from given data. Using 'Displacement-time' graphs to calculate instantaneous and average speeds. Using 'Speed-time' graphs to describe acceleration or deceleration. Use area under a 'Speed-time' graph to calculate distance travelled. Describe how to make a fair experiment and how to collect reliable data. Describe the basic Newtonian laws of Motion using simple diagrams of everyday objects. Understand and/or label simple diagrams with 'Force-vector' arrows.

#### Understand the Problem

The question is asking for assistance with various physics concepts, including speed, velocity, acceleration, graph plotting, conducting fair experiments, and understanding Newton's laws of motion. This includes calculations and the correct use of SI units.

#### Answer

Speed is scalar; velocity is vector. Acceleration is rate of velocity change.

Speed is a scalar quantity that refers to how fast an object is moving, measured in meters per second (m/s). Velocity is a vector quantity that describes the object's speed and direction. Acceleration, measured in meters per second squared (m/s^2), is the rate of change of velocity over time.

##### Answer for screen readers

Speed is a scalar quantity that refers to how fast an object is moving, measured in meters per second (m/s). Velocity is a vector quantity that describes the object's speed and direction. Acceleration, measured in meters per second squared (m/s^2), is the rate of change of velocity over time.

#### More Information

Although speed is often expressed simply as the magnitude of velocity, velocity itself includes both speed and direction. Newton's laws explain motion through principles like inertia and force interactions.

#### Tips

A common mistake is confusing speed with velocity; remember that velocity includes direction while speed does not. Also, acceleration is often misconceived as speed; it is actually the rate of change of velocity.

#### Sources

- Speed versus Velocity - The Physics Classroom - physicsclassroom.com
- Speed, Velocity & Acceleration | Difference & Relationship - Lesson - study.com

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