E-1 Flashcard

Front

What is constant speed?

Back

Constant speed refers to the speed of an object that does not change over time. For example, if a whale swims at a constant speed of 5 m/s, it maintains that speed throughout its movement.

Front

What does it mean to speed up?

Back

Speeding up, or acceleration, occurs when an object's speed increases over time. For instance, a whale that starts swimming slowly and gradually increases its speed is speeding up.

Front

What does it mean to slow down?

Back

Slowing down, or deceleration, occurs when an object's speed decreases over time. For example, if a whale is swimming and gradually reduces its speed, it is slowing down.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction. For example, '30 miles per hour' is speed, while '30 miles per hour north' is velocity.

Front

How can we determine if an object is stopped?

Back

An object is considered stopped when its speed is zero. For example, if a whale is not moving at all, it is stopped.

Front

What is a velocity-time graph?

Back

A velocity-time graph is a graphical representation that shows how an object's velocity changes over time. The x-axis represents time, while the y-axis represents velocity.

Front

What does a horizontal line on a velocity-time graph indicate?

Back

A horizontal line on a velocity-time graph indicates that the object is moving at a constant velocity.

Front

What does a sloping line on a velocity-time graph indicate?

Back

A sloping line on a velocity-time graph indicates that the object is either speeding up (if the slope is upward) or slowing down (if the slope is downward).

Front

What is the significance of the area under a velocity-time graph?

Back

The area under a velocity-time graph represents the distance traveled by the object during that time interval.

Front

How do you identify the time of direction change on a velocity-time graph?

Back

The time of direction change on a velocity-time graph is identified where the graph crosses the time axis (where velocity is zero).