Speed, Acceleration, and Velocity Notes 3.20.12
Speed
Speed is the distance an object moves in a period of time, indicating how fast the object is moving. To determine speed, divide the distance traveled by the time it takes to travel that distance.
Because speed equals distance per time, the equation used to calculate speed is:
Speed= Distance/Time
or
s=d/t
There are several units used to measure speed. For example, a car's speed is usually represented in miles per hour (mi/hr)- the distance (miles) a car travels in a period of time (hour). In science, kilometers per hour (km/hr) and meters per second (m/s) are common speed units.
Speed is the distance an object moves in a period of time, indicating how fast the object is moving. To determine speed, divide the distance traveled by the time it takes to travel that distance.
Because speed equals distance per time, the equation used to calculate speed is:
Speed= Distance/Time
or
s=d/t
There are several units used to measure speed. For example, a car's speed is usually represented in miles per hour (mi/hr)- the distance (miles) a car travels in a period of time (hour). In science, kilometers per hour (km/hr) and meters per second (m/s) are common speed units.
Acceleration
If an object speeds up, slows down, or changes direction, the object is accelerating. Acceleration occurs because a force acts upon an object, causing the object to change its speed or direction. Recall that a force is a push or a pull. Acceleration can also be described as a change in velocity. Any object increasing or decreasing its speed or changing directions is accelerating.
If an object speeds up, slows down, or changes direction, the object is accelerating. Acceleration occurs because a force acts upon an object, causing the object to change its speed or direction. Recall that a force is a push or a pull. Acceleration can also be described as a change in velocity. Any object increasing or decreasing its speed or changing directions is accelerating.
Velocity
Speed only refers to the distance of an object travels in a certain period of time. It does not include information about the direction an object is travelling. Velocity is how fast an object travels in a particular direction. For example, a semitruck travelling 70 mi/hr north describes the velocity of the truck. Velocity is a factor of speed (distance and time) and direction.
Velocity=displacement/time
Speed only refers to the distance of an object travels in a certain period of time. It does not include information about the direction an object is travelling. Velocity is how fast an object travels in a particular direction. For example, a semitruck travelling 70 mi/hr north describes the velocity of the truck. Velocity is a factor of speed (distance and time) and direction.
Velocity=displacement/time