The speed 72 km/hour. What is the in-SI system of units?
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![**Problem:**
10. The speed is 72 km/hour. What is this in the SI system of units?
**Explanation:**
To convert the speed from kilometers per hour (km/h) to meters per second (m/s) in the SI system:
1. **Convert kilometers to meters:**
- 1 kilometer (km) = 1000 meters (m)
- Therefore, 72 km = 72,000 meters
2. **Convert hours to seconds:**
- 1 hour = 3600 seconds
- Therefore, 1 km/hour is equivalent to 1/3600 km/second
3. **Combine both conversions:**
- \[ \text{Speed in m/s} = \frac{72,000 \text{ meters}}{3600 \text{ seconds}} \]
4. **Calculate:**
- \[ \text{Speed in m/s} = \frac{72,000}{3600} = 20 \text{ meters per second (m/s)} \]
So, 72 km/hour is equivalent to 20 m/s in the SI system.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F284e3ac9-3468-43c5-8292-196f76a9fc38%2F05b5369f-b15a-4c16-a8b3-d04a5627f9ef%2F50wyc0p_processed.png&w=3840&q=75)
Transcribed Image Text:**Problem:**
10. The speed is 72 km/hour. What is this in the SI system of units?
**Explanation:**
To convert the speed from kilometers per hour (km/h) to meters per second (m/s) in the SI system:
1. **Convert kilometers to meters:**
- 1 kilometer (km) = 1000 meters (m)
- Therefore, 72 km = 72,000 meters
2. **Convert hours to seconds:**
- 1 hour = 3600 seconds
- Therefore, 1 km/hour is equivalent to 1/3600 km/second
3. **Combine both conversions:**
- \[ \text{Speed in m/s} = \frac{72,000 \text{ meters}}{3600 \text{ seconds}} \]
4. **Calculate:**
- \[ \text{Speed in m/s} = \frac{72,000}{3600} = 20 \text{ meters per second (m/s)} \]
So, 72 km/hour is equivalent to 20 m/s in the SI system.
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