Speed and velocity

Speed depends on both distance and direction.

• True

• False

If you run a 100-meter race in 20 seconds, what is your average speed during the race?

• a. 20 m/s

• b. 10m/s

• c. 5m/s

• d. 2m/s

The general formula of speed?

• speed= time÷ distance

• Speed=distance÷ time

• speed=distance × time

The international standard unit for speed is meters per second (m/s).

• True

• False

Velocity depends on both distance and direction

• True

• False

When we say a car travels at 20 km/h, we are specifying its （ ）.

• Velocity

• Speed

When we say a car moves at 20 km/h to the east, we are specifying its ( ).

• Speed

• Velocity

( ) is a measure of how fast or slow something moves.

• Speed

• time

• distance

• velocity