Speed and Sound

What is the speed of an object that travels 60 meters in 4 seconds?

• 240 m/s

• 15 m/s

• 240 km/h

• 15 km/h

Bryan runs a 400 m race with a speed of 4 m/s. What time will it take him to finish the race?

• 100 seconds

• 1600 seconds

• 100 minutes

• 1600 minutes

Constant speed is a speed that is ________ all the time.

• unchanged

• changing

• increasing

• decreasing

Chloe runs 100 m in 20 seconds. Wai Him runs the same distance in 15 seconds. Who is faster?

• Chloe

• Wai Him

• Both

Which of the following is a unit of speed?

• min/km

• km

• minute

• km/min

Match the graph to the description:

"The car is stopped."

• 
• 
• 
• 

Segment O-A: The bus is _________________. It's speed changes from 0m/s to 10 m/s in 5 seconds.

• accelerating

• decelerating

• moving at a constant speed

• not moving

At what point is the speed the greatest?

• B

• C

• D

• E

Ball A goes 15 metres in 3 seconds, ball B goes 12 metres in 2 seconds. Which ball moved the fastest?

• Ball A

• Ball B

• Their speeds are equal.

What speed is been shown on the speedometer?

• 82 km/h

• 85 km/h

• 90 km/h