Question

school speed-zone is 30 km/h. Three cars A,B,andCaregoingatspeedsvA =8m/s,vB = 9 m/s, and vc = 10 m/s. The cars that will receive speeding tickets are:

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Darrell

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Solution:

1. Convert the speed limit to meters per second.

- The speed limit is 30 km/h.

- Convert km/h to m/s:1 \text{ km/h} = \frac{1}{3.6} \text{ m/s}

- Therefore,30 \text{ km/h} = 30 \times \frac{1}{3.6} \text{ m/s} = \frac{30}{3.6} \text{ m/s} = 8.33 \text{ m/s}

2. Compare the speeds of cars A, B, and C to the speed limit.

- Speed of car A:8 \text{ m/s} (less than 8.33 \text{ m/s} , so car A is not speeding)

- Speed of car B:9 \text{ m/s} (greater than 8.33 \text{ m/s} , so car B is speeding)

- Speed of car C:10 \text{ m/s} (greater than 8.33 \text{ m/s} , so car C is speeding)

3. Conclusion:

- Cars B and C are exceeding the speed limit and will receive speeding tickets.

1. Convert the speed limit to meters per second.

- The speed limit is 30 km/h.

- Convert km/h to m/s:

- Therefore,

2. Compare the speeds of cars A, B, and C to the speed limit.

- Speed of car A:

- Speed of car B:

- Speed of car C:

3. Conclusion:

- Cars B and C are exceeding the speed limit and will receive speeding tickets.

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