A car travels at a speed of 72 km/h. What is its speed in m/s?
Practice Questions
Q1
A car travels at a speed of 72 km/h. What is its speed in m/s?
20 m/s
15 m/s
25 m/s
30 m/s
Questions & Step-by-Step Solutions
A car travels at a speed of 72 km/h. What is its speed in m/s?
Step 1: Understand that we need to convert kilometers per hour (km/h) to meters per second (m/s).
Step 2: Know that 1 kilometer is equal to 1000 meters.
Step 3: Know that 1 hour is equal to 3600 seconds.
Step 4: Multiply the speed in km/h by 1000 to convert kilometers to meters: 72 km/h * 1000 = 72000 meters.
Step 5: Divide the result by 3600 to convert hours to seconds: 72000 meters / 3600 seconds = 20 meters/second.
Step 6: Conclude that the speed of the car in m/s is 20 m/s.
Unit Conversion – Understanding how to convert speed from kilometers per hour (km/h) to meters per second (m/s) using the conversion factors of 1000 meters in a kilometer and 3600 seconds in an hour.