What is the speed in m/s of a car travelling at 120 km/h?

What is the speed in m/s of a car travelling at 120 km/h?

• A. 35 m/s
• B. 40 m/s
• C. 42 m/s
• D. 24 m/s

Answer: (C)

To convert the speed of a car from kilometers per hour (km/h) to meters per second (m/s), you can use the conversion factor that 1 km is equal to 1000 meters and 1 hour is equal to 3600 seconds. Starting with the speed of 120 km/h, you can break down the conversion as follows: 1. Convert kilometers to meters: 120 km = 120,000 meters 2. Convert hours to seconds: 1 hour = 3600 seconds 3. Now, to convert the speed to meters per second: \[ \text{Speed in m/s} = \frac{120,000 \text{ meters}}{3600 \text{ seconds}} = \frac{120000}{3600} \] 4. When you perform the calculation: \[ \text{Speed in m/s} = 33.33 \, \text{m/s} \] However, recalculating correctly gives: \[ 120 \, \text{km/h} = \frac{120 \times 1000}{3600} = \frac{120,000}{3600} \approx 33.

To convert the speed of a car from kilometers per hour (km/h) to meters per second (m/s), you can use the conversion factor that 1 km is equal to 1000 meters and 1 hour is equal to 3600 seconds.

Starting with the speed of 120 km/h, you can break down the conversion as follows:

1. Convert kilometers to meters:

120 km = 120,000 meters

2. Convert hours to seconds:

1 hour = 3600 seconds

3. Now, to convert the speed to meters per second:

[

\text{Speed in m/s} = \frac{120,000 \text{ meters}}{3600 \text{ seconds}} = \frac{120000}{3600}

]

4. When you perform the calculation:

[

\text{Speed in m/s} = 33.33 , \text{m/s}

]

However, recalculating correctly gives:

[

120 , \text{km/h} = \frac{120 \times 1000}{3600} = \frac{120,000}{3600} \approx 33.