Unit 2 Flashcard 1 Review

Front

What is a unit of time?

Back

A unit of time is a standard measurement used to quantify the duration of events. Examples include seconds (sec), minutes, and hours.

Front

How do you calculate the time taken to finish a race?

Back

Time = Distance / Speed. For example, if Dave runs a 400 m race at 4 m/s, the time taken is 400 m / 4 m/s = 100 seconds.

Front

What does a graph showing an object's motion indicate?

Back

A graph can show how an object's position changes over time, indicating whether it is moving in a positive or negative direction.

Front

What two measurements are necessary for calculating speed?

Back

Distance and time are necessary to calculate speed. Speed = Distance / Time.

Front

How do you find average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken. For example, if a runner completes 100 meters in 10 seconds, her average speed is 100 m / 10 s = 10 m/s.

Front

What is the formula for speed?

Back

Speed = Distance / Time.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can be positive (speeding up) or negative (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.

Front

What is a scalar quantity?

Back

A scalar quantity is a physical quantity that has only magnitude and no direction, such as speed or mass.

Front

What is a vector quantity?

Back

A vector quantity is a physical quantity that has both magnitude and direction, such as velocity or acceleration.