Speed

Speed is a measure of how fast an object is moving. It is a scalar quantity, which means it only has a magnitude and no direction.

Calculating Speed

The formula for calculating speed is:

Speed = Distance / Time

where Speed is measured in units such as meters per second (m/s) or kilometers per hour (km/h), Distance is measured in units such as meters (m) or kilometers (km), and Time is measured in units such as seconds (s) or hours (h).

Types of Speed

There are different types of speed, including:

Instantaneous Speed: The speed of an object at a particular moment in time.
Average Speed: The total distance traveled divided by the total time taken.
Uniform Speed: When an object covers equal distances in equal intervals of time.
Non-Uniform Speed: When an object covers unequal distances in equal intervals of time.

Factors Affecting Speed

Several factors can affect the speed of an object, including:

Force: The application of force can increase or decrease the speed of an object.
Friction: Friction with the surface can reduce the speed of an object.
Air Resistance: Objects moving through the air experience air resistance, which can affect their speed.

Study Guide

Here are some key points to remember about speed:

Speed is a measure of how fast an object is moving and is calculated as distance traveled divided by the time taken.
There are different types of speed, including instantaneous speed, average speed, uniform speed, and non-uniform speed.
Factors such as force, friction, and air resistance can affect the speed of an object.
Units of speed include meters per second (m/s) and kilometers per hour (km/h).

Remember to practice calculating speed using the formula Speed = Distance / Time, and pay attention to the units of distance and time to ensure you get the correct units for speed.

Good luck with your studies!