Physical Science, Chapter 11, Motion, Post Assessment

Front

What is the most appropriate SI Unit to express the speed of a cyclist in the last leg of a 10-km race?

Back

km/h

Front

What does the prefix kilo- mean?

Back

1000

Front

What is the rate at which velocity changes called?

Back

acceleration

Front

If a soccer ball is kicked from 40 meters out and takes 5 seconds to reach the goal, what speed was the ball traveling? (d= 40 m, t= 5 s)

Back

8 m/s

Front

What is the change of position over time called?

Back

motion

Front

Define speed in the context of motion.

Back

Speed is the distance traveled per unit of time.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity over time.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What is the SI unit of acceleration?

Back

m/s²